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Subject: Science and Technology

  • MIT Research of Ionic Liquids (ILs)

    Why in the News?

    MIT-led research suggests life may not need liquid water; ionic liquids (salts that stay liquid below 100°C) could support life on rocky super-Earths with volcanic activity and little water.

    About Ionic Liquids (ILs):

    • Overview: Salts in liquid form below 100°C, composed entirely of ions.
    • Properties: Non-volatile, non-flammable, thermally stable, and tunable as hydrophobic or hydrophilic.
    • Structure: Unlike water (neutral molecules), ILs consist of ions and ion pairs.
    • Electrochemical Use: Excellent electrolytes with broad electrochemical windows.
    • Applications: Used in synthesis, catalysis, electrochemistry, extraction, biotechnology, and as green alternatives to volatile solvents.

    Breakthrough Findings of MIT Study:

    • Life Without Water: Experiments showed life could potentially survive using ILs as solvents instead of water.
    • Natural Formation: Sulfuric acid mixed with nitrogen compounds can naturally form ILs.
    • Exoplanet Link: Such ILs may exist on rocky super-Earths with volcanic activity and thin atmospheres.
    • Venus Research Origin: Discovery emerged from studying Venus, where sulfuric acid clouds interact with organic molecules to form ILs.
    • Biological Relevance: ILs can provide stable environments for biomolecules, supporting metabolism.

    Significance of the Study:

    • Habitability Expansion: Broadens habitability definition beyond water-based models.
    • Biosignatures: Suggests new chemical markers for exoplanet life detection.
    • Venus Missions: Strengthens rationale for Venus’s exploration targeting IL-based chemistry.
    • Wider Habitable Zones: Implies more planets could host life than previously thought.
    [UPSC 2015] The term ‘Goldilocks Zone’ is often seen in the news in the context of:

    (a) the limits of habitable zone above the surface of the Earth

    (b) regions inside the Earth where shale gas is available

    (c) search for the Earth-like planets in outer space*

    (d) search for meteorites containing precious metals

     

  • Orbiting Carbon Observatories (OCO) Program

    Why in the News?

    The Trump administration seeks to end two NASA missions under the Orbiting Carbon Observatories (OCO) program, which monitor global carbon dioxide emissions and plant health.

    About Orbiting Carbon Observatories (OCO) Program:

    • Overview: A NASA Earth remote sensing initiative dedicated to monitoring atmospheric carbon dioxide (CO₂) from space.
    • Objective: Designed to enhance understanding of climate change by precisely tracking CO₂ sources and sinks.
    • Comprises three missions:
      • OCO-1: Launched in 2009 but failed shortly after launch.
      • OCO-2: Launched in July 2014 as a replacement.
      • OCO-3: Installed on the International Space Station in May 2019.

    Key Features:

    • Precision Measurement: Provides high-resolution global CO₂ data and maps of plant photosynthesis.
    • Dual Capability: Measures CO₂ levels and solar-induced chlorophyll fluorescence to assess photosynthesis.
    • Applications: Detects drought, forecasts food shortages, identifies carbon sinks/sources, supports crop planning.
    • Global Reach: Tracks CO₂ distribution over continents, oceans, and remote ecosystems like Amazon and boreal forests.
    • Major Discoveries: Amazon rainforest now emits more CO₂ than it absorbs; boreal forests identified as major carbon sinks.
    • Policy Relevance: Supplies key data for climate treaties and greenhouse gas reporting.
    [UPSC 2019] For the measurement/estimation of which of the following are satellite images/remote sensing data used?

    1. Chlorophyll content in the vegetation of a specific location

    2. Greenhouse gas emissions from rice paddies of a specific location

    3. Land surface temperatures of a specific location

    Select the correct answer using the code given below.

    Options: (a) 1 only (b) 2 and 3 only (c) 3 only (d) 1, 2 and 3*

     

  • How does satellite internet work?

    Why in the News:

    Elon Musk’s Starlink will soon launch in India, promising high-speed internet access in regions beyond the reach of ground-based networks. This is significant as it can bridge rural-urban gaps, improve disaster resilience, and strengthen defence capabilities. Globally, satellite internet has been a lifeline during Hurricane Harvey and a tactical tool in the Russia-Ukraine war. For India, it represents both a technological leap and a strategic necessity.

    Introduction:

    In today’s digitised and interconnected world, internet access is as vital as electricity or transport. Traditional cable and tower-based networks excel in cities but falter in remote terrains. Satellite internet, powered by mega-constellations like Starlink, offers a borderless, high-resilience alternative that operates irrespective of geography.

    Why are ground-based internet networks economically unviable in certain regions?

    1. Physical Infrastructure Limits: Cables and towers are uneconomical for sparsely populated or remote regions
    2. Disaster Vulnerability: Infrastructure can be wiped out during floods, earthquakes, or storms
    3. On-the-Go Connectivity Gap: Mobile and temporary operations (airplanes, ships, oil rigs) often remain underserved

    How does satellite internet overcome these challenges?

    1. Global Coverage: Operates regardless of terrain or terrestrial infrastructure
    2. Rapid Deployment: Can be set up quickly to meet sudden demand surges
    3. Mobility Advantage: Supports moving platforms and remote sites
    4. Dual-Use Potential: Functions for both civil and military purposes (e.g., Ukrainian defence, Siachen Glacier operations)

    What makes the new wave of satellite internet significant?

    1. Mega-Constellations: Networks like Starlink have thousands of satellites in Low Earth Orbit (LEO)
    2. Disaster Response Role: Viasat aided Hurricane Harvey operations when 70% of cell towers failed.
    3. Defence Integration: Ukrainian drones fitted with Starlink to bypass Russian jamming; Indian Army use in high-altitude conflict zones
    4. Security Concerns: Smuggled Starlink devices used by insurgent groups and drug cartels

    Working of satellite internet:

    1. Two Segments: Space segment (satellites) and ground segment (user terminals, gateways).
    2. Service Life: Satellites operate for 5–20 years depending on design.
    3. Orbits:
      1. GEO (35,786 km): Wide coverage, high latency; unsuitable for real-time apps. Example: Viasat GX.
      2. MEO (2,000–35,786 km): Medium latency, requires constellations. Example: O3b.
      3. LEO (<2,000 km): Low latency, small coverage; requires mega-constellations. Example: Starlink’s 7,000+ satellites.

    Key Differences between satellites in GEO, MEO AND LEO:

    Feature Geostationary Earth Orbit (GEO) Medium Earth Orbit (MEO) Low Earth Orbit (LEO)
    Altitude 35,786 km above equator 2,000 – 35,786 km Below 2,000 km
    Relative Motion Stationary relative to a point on Earth Moves relative to Earth Moves quickly relative to Earth
    Coverage ~1/3 of Earth (no polar coverage) Larger than LEO, smaller than GEO; needs constellation for global coverage Small footprint; single satellite covers area like an Indian metro city
    Satellite Size Large Large Smaller, often table-sized
    Cost & Deployment Expensive, long deployment Expensive, smaller constellations Cheaper, quicker to deploy
    Latency High (unsuitable for time-sensitive apps) Medium (lower than GEO but still limits real-time use) Very low (good for real-time use)
    Example Viasat Global Xpress (GX) O3b constellation (20 satellites) Starlink (7,000+ satellites, aiming for 42,000)
    Key Drawback High delay due to distance Still costly, latency not ideal for all uses Needs thousands of satellites for global coverage

    How do LEO mega-constellations maintain connectivity?

    1. On-Board Processing: Improves efficiency and reduces terminal complexity
    2. Optical Inter-Satellite Links: Satellites communicate directly in space for faster routing
    3. Seamless Handoff: Steerable antennas track multiple satellites to maintain uninterrupted service

    What are the key applications of satellite internet?

    1. Civil Connectivity: Rural broadband, IoE (Internet of Everything)
    2. Transportation: Navigation, self-driving cars, logistics optimisation
    3. Public Administration: Smart cities, disaster warnings, rescue coordination
    4. Healthcare: Telemedicine, remote diagnostics
    5. Agriculture: Precision farming, crop health monitoring
    6. Defence & Security: Real-time communication in conflict zones, strategic surveillance

    Conclusion

    Satellite internet represents not just a technological upgrade but a strategic asset in the digital era. For India, it offers a pathway to bridge the digital divide, enhance national resilience, and project influence in the global communications domain. However, its dual-use nature demands strong regulatory frameworks to balance innovation, accessibility, and security.

    Value Addition

    Key Terms & Phrases Explained

    • Satellite Internet: A communication service where internet connectivity is provided through satellites orbiting the Earth, rather than terrestrial cables/towers. It enables access in remote, disaster-hit, or mobile scenarios.
    • Mega-Constellation: A large network of hundreds or thousands of satellites, often in Low Earth Orbit (LEO), working in coordination to provide continuous coverage. Example: Starlink (planned 42,000 satellites).
    • Latency: Time taken for a signal to travel from sender to receiver; critical for real-time applications like video conferencing or online gaming.
    • Optical Inter-Satellite Links (OISL): Laser-based connections between satellites, enabling direct space-to-space data transfer without routing through ground stations, reducing delays and congestion.
    • Dual-Use Technology: A technology with both civilian and military applications. In satellite internet, the same network can support remote learning and healthcare or battlefield communication and drone operations.
    • Digital Divide: The socio-economic gap between those with access to modern digital technologies (internet, computing) and those without.
    • International Telecommunication Union (ITU): A UN agency responsible for coordinating global telecom networks, including orbital slot and spectrum allocation for satellites.
    • On-Board Processing: Satellite’s ability to process data directly in orbit, improving signal quality, speed, and reducing complexity of user terminals.
    • Seamless Handoff: Automatic switching of user connection from one satellite to another as satellites move, ensuring uninterrupted service.
    • Internet of Everything (IoE): An extension of IoT where not only devices, but also data, processes, and people are interconnected via the internet.

    Mapping  Micro Themes

    Paper Macro Theme Micro Themes Sub-Micro / Example
    GS Paper III Types of Orbits GEO (Geostationary) INSAT series, GSAT satellites
    MEO (Medium Earth Orbit) O3b constellation for broadband
    LEO (Low Earth Orbit) Starlink, OneWeb
    GS Paper III Application in Navigation GNSS Variants GPS (USA), GLONASS (Russia), Galileo (EU), IRNSS/NavIC (India)
    LEO & MEO in Navigation Faster signals, better coverage
    GS Paper II Policy & Governance India’s Space Policy 2023 PPP in satellite communication
    International Coordination ITU spectrum allocation

    Practice Mains Question:

    Discuss the potential of satellite internet in bridging the digital divide in India. Examine the associated security and regulatory challenges.

    PYQ Linkage:

    [UPSC 2018] Why is the Indian Regional Navigational Satellite System [IRNSS] needed? How does it help in navigation? 

    Linkage: IRNSS (also called NavIC) is India’s indigenous satellite-based navigation system providing accurate position information over India and surrounding regions.

    Just like IRNSS uses satellites for positioning, satellite internet uses similar orbital infrastructure for data connectivity. Understanding satellite orbits, latency, and ground segments from this topic directly aids in explaining IRNSS’s working, advantages, and strategic value in navigation.

     

  • Muon g-2 Experiment

    Why in the News?

    Scientists at Fermilab in the USA have made an ultra-precise measurement of the muon’s magnetic behaviour, a finding that could hint at new physics beyond current laws.

    Muon g-2 Experiment

    Understanding Muon and G-2:

    • Overview: A muon is a subatomic particle like an electron but about 200 times heavier.
    • Behaviour: It has spin, making it act like a tiny magnet.
    • g-Factor: The magnet’s strength is measured by the g-factor. In simple theory, g = 2, but quantum effects make it slightly different — this difference is called g-2 (g minus 2).
    • Physics Relevance: Measuring g-2 can reveal unknown forces or particles beyond the Standard Model.

    The Fermilab Breakthrough:

    • Precision Record: Fermilab (USA) measured muon’s g-2 to an accuracy of 0.127 parts per million — comparable to detecting a 4-gram change on a 4-tonne elephant.
    • Method: Muons were sent into a large magnetic ring, measuring the gap between spin rate and orbital rate.
    • Results: Matches earlier experiments; disagreement with theory depends on calculation method used.
    • Next Steps: Japan’s upcoming experiment will independently test results.

    Significance:

    • Potential New Physics: If the gap is real, it may signal undiscovered forces or particles.
    • Refining Theory: If not, calculations will improve, sharpening known physics.
    • Broader Impact: Advances precision science and deepens global understanding of fundamental physics.
    • Lesson: Ultra-precise measurements can uncover hidden truths about nature.
    [UPSC 2013] The efforts to detect the existence of Higgs boson particle have become frequent news in the recent past. What is/are the importance/importances of discovering this particle?

    1. It will enable us to under-stand as to why elementary particles have mass.

    2. It will enable us in the near future to develop the technology of transferring matter from one point to another without traversing the physical space between them.

    3. It will enable us to create better fuels for nuclear fission.

    Select the correct answer using the codes given below.

    Options: (a) 1 only* (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3

     

  • [pib] MSS+ Technology in Road Construction

    Why in the News?

    The CSIR–Central Road Research Institute, New Delhi, has developed MSS+ (Modified Mix Seal Surfacing Plus) technology for eco-friendly, durable, and low-cost road surfacing.

    About MSS+ Technology:

    • Developer: Council of Scientific & Industrial Research – Central Road Research Institute (CSIR–CRRI), New Delhi.
    • Year of Development: 2021 (in collaboration with J.M.V.D. Industries).
    • Pilot Project: First road in Uttar Pradesh built near Lucknow in 2022; Used for 202 km of roads under Pradhan Mantri Gram Sadak Yojana (PMGSY) in 2025.
    • Composition: Crushed natural aggregate, customised modified bitumen emulsion, mineral admixture.
    • Preparation: Mix made at ambient temperature, eliminating heating of aggregate or bitumen.
    • Laying: 25–30 mm thickness using conventional asphalt pavers.

    Benefits Offered:

    • Eco-Friendly: No thermal process → significantly reduces carbon emissions.
    • Durable: Provides strong wearing course, enhanced skid resistance, and prevents water infiltration.
    • Cost-Effective: Reduced energy requirement lowers construction costs.
    • All-Weather Use: Can be laid in varied weather conditions due to ambient temperature application.
    [UPSC 2020] In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint?

    1. Copper slag 2. Cold mix asphalt technology 3. Geotextiles 4. Hot mix asphalt technology 5. Portland cement

    Select the correct answer using the code given below:

    Options: (a) 1, 2 and 3 only * (b) 2, 3 and 4 only (c) 4 and 5 only (d) 1 and 5 only

     

  • How is AI reshaping India’s infotech sector?

    PYQ Relevance:

    [UPSC 2023] Introduce the concept of Artificial Intelligence (AI). How does Al help clinical diagnosis? Do you perceive any threat to privacy of the individual in the use of Al in healthcare?

    Linkage: Artificial Intelligence (AI) simulates human intelligence to perform tasks like analysis, prediction, and decision-making, and in healthcare, it aids clinical diagnosis through rapid image interpretation, predictive analytics, and early disease detection. Linking to India’s evolving IT sector, AI’s role in data management and compliance can ensure safe healthcare adoption, but risks such as data breaches, misuse of personal health records, and algorithmic bias highlight the need for strong privacy safeguards and ethical standards.

    Introduction:

    The Indian IT industry, valued at $280 billion and employing over 5.8 million people, has been the backbone of India’s digital economy for decades. However, the rise of AI is reshaping business models, altering talent requirements, and compelling firms to rethink their role in the global technology ecosystem. Far from being a simple “job killer,” AI is redefining the industry’s competitive advantage.

    Why is the IT Industry in Restructuring Mode?

    1. Beyond the “AI kills jobs” narrative:
      1. The shake-up is not merely about replacing human workers with AI, but about re-engineering processes for efficiency and scale.
      2. AI is driving transformation across the entire software lifecycle — from coding to testing and maintenance.
    2. The TCS trigger:
      1. TCS’s freeze on experienced hires and planned removal of 12,000 employees has been interpreted as a signal to markets, clients, and employees:
      2. Markets: Cost optimisation and forward-looking adaptation.
      3. Clients: AI-powered efficiency.
      4. Employees: Need for continuous upskilling.

    Why is AI Gaining Momentum Now?

    • Cost-optimisation as a driver:
      1. AI-led productivity boosts (30%+) are critical in a cost-sensitive, investor-driven market.
      2. Examples: AI-powered coding assistants, intelligent debuggers, automated testing.
    • Investment surge:
      1. In 2025, $1 trillion+ expected global spending on AI infrastructure, training, and applications.

    Impact on Jobs and Skills

    1. Job contraction in some areas:
      1. Automation, low-code platforms, and AI reduce the need for large teams in certain roles.
      2. Example: U.S. firms openly using workforce attrition to streamline operations.
    2. Skills that remain resilient:
      1. Core coding in C++ (OS, gaming, security systems), robotics, embedded systems.
      2. High-value areas: product management, UI/UX, tech architecture.
    3. Traits that will rule: math skills, imagination, problem-solving.

    Opportunity for India’s IT Sector

    • Addressing global AI adoption barriers:
      1. Legacy systems, poor data quality, and compliance requirements are major bottlenecks abroad.
      2. Indian firms can: Modernise systems, Organise and clean data and Build compliant AI solutions (aligning with laws like EU’s AI Act).
    • Moving from “back office” to “AI innovation partners”:
      1. Future advantage lies with small, lean AI-native teams solving complex domain-specific problems (healthcare, defence, fintech, sustainability, education).

    From Scale to Specialisation:

    1. The traditional “IT park with thousands of coders” model is declining.
    2. A 50-member AI-focused team can outperform a 5,000-member legacy services team.
    3. Requires cultural shift in Indian IT firms from scale efficiency to innovation agility.

    Conclusion:

    AI is not the end of India’s IT story, but a call for reinvention. By leveraging its talent pool, improving innovation culture, and addressing global AI adoption barriers, India can position itself not just as a participant but as a shaper of the AI era. The challenge lies in embracing the shift from large-scale coding work to lean, high-value, AI-driven problem solving.

    Value Addition:

    Thinkers & Scholars on AI: 

    Andrej Karpathy

    • Background: Former Director of AI at Tesla, known for his work on deep learning and computer vision.
    • View: Describes the shift to Software 2.0 and 3.0, where AI models themselves become the primary source code, reducing the advantage of large coding teams.
    • Relevance: Highlights why India’s IT sector must shift from scale-based operations to innovation-focused, AI-native solutions.

    V. Balakrishnan

    • Background: Chairman, Exfinity Ventures; former CFO at Infosys.
    • View: AI is becoming the fabric of enterprise operations, shaping everything from customer service to boardroom decision-making; Indian IT firms can become enablers of global AI adoption.
    • Relevance: Emphasises India’s opportunity in data cleaning, system modernisation, and AI compliance.

    Extra Mile:

    AI Capitalism – Concept: It refers to an economic and social order where artificial intelligence technologies become a core driver of capital accumulation, market power, and social influence. In this system, AI is not just a tool but a means of consolidating wealth and control in the hands of a few global tech giants, venture capital firms, and AI infrastructure providers.

    Scholars and Thinkers

    1. Shoshana Zuboff (The Age of Surveillance Capitalism) – Warns that AI capitalism commodifies human behaviour through constant data extraction.
    2. Nick Srnicek (Platform Capitalism) – Argues AI platforms centralise power and reshape markets in ways that undermine competition.
    3. Kate Crawford (Atlas of AI) – Highlights the environmental, political, and ethical costs of AI capitalism.

     

    Mapping Micro-themes:

    GS PAPER II Governance in technology adoption, regulation, Tech policy & regulation, India as a global technology partner:

    • Regulatory dimension: Global AI governance (EU AI Act) influencing Indian compliance services.
    • Geopolitical angle: India’s role as a trusted AI partner amid U.S.-China tech tensions.
    GS PAPER III Economic growth, employment (AI & automation impact on employment ), AI innovation ecosystem (Innovation-driven economy), Start-up ecosystem in AI

    • Economic implications: Job losses in low-skilled IT roles vs. high-skilled job creation in AI.
    GS PAPER IV Ethical AI (fairness, transparency, bias mitigation)

    Examples:

    • TCS workforce restructuring as a market signal
    • EU AI Act influencing compliance-driven service demand
    • AI-native teams in healthcare and defence as future growth hubs

     

    Practice Mains Question

    1. Discuss how Artificial Intelligence is reshaping India’s information technology sector. In your answer, highlight both the challenges and opportunities this transition presents. (250 words)

  • COCO 4.9 Ocean Circulation Model

    Why in the News?

    Researchers used the COCO (Center for Climate System Research Ocean Component) 4.9 ocean model to predict how tritium from Fukushima’s 30-year wastewater release will spread across the Pacific under current and future climates.

    Tap to read more about the Fukushima Disaster.

    About COCO 4.9 Ocean Circulation Model:

    • Purpose: Computer-based ocean simulator to study how seawater moves, mixes, and changes over time.
    • Method: Divides oceans into layers and grids; calculates current flows and mixing patterns.
    • Resolution: Can run in low detail (large grid blocks) or high detail (small swirling eddies).
    • Climate Link: Can model impacts of warming oceans, altered currents, and changing circulation.
    • Fukushima Application: Created a “virtual Pacific Ocean” to track tritium spread over decades.

    Utility in Nuclear Waste Disposal:

    • Predicts where, how fast, and how much nuclear contaminants will disperse.
    • Maps dispersion pathways for radioactive materials like tritium.
    • Estimates arrival times to different ocean regions.
    • Models long-term concentrations under various climate scenarios.

    Key Findings – Fukushima Study

    • Tritium levels projected well below natural background radiation across the Pacific.
    • Global warming may speed up some currents, but levels remain undetectable.
    • Tritium’s natural 12-year half-life ensures minimal long-term impact.

     

    [UPSC 2024] With reference to radioisotope thermoelectric generators (RTGs), consider the following statements:

    1. RTGs are miniature fission reactors. 2. RTGs are used for powering the onboard systems of spacecrafts. 3. RTGs can use Plutonium-238, which is a by-product of weapons development.

    Which of the statements given above are correct?

    Options: (a) 1 and 2 only (b) 2 and 3 only* (c) 1 and 3 only (d) 1, 2 and 3

     

  • Kauzmann’s Hypothesis on Protein Core Structure

    Why in the News?

    Walter Kauzmann’s 1959 idea that protein folding relies on water-loving and water-avoiding parts has now been challenged by new research showing protein cores are more flexible than once believed.

    Protein and Protein Folding – Overview

    • Proteins: Biological macromolecules made of 20 amino acids in specific sequences.
    • Folding: Sequence dictates 3D shape, essential for function.
    • Water Interaction:
      • Hydrophilic (e.g., lysine) → outer surface.
      • Hydrophobic (e.g., tryptophan) → buried in core.
    • Kauzmann Hypothesis (1959): Proteins have a hydrophobic core and hydrophilic surface, guiding folding.
    • 1960s X-ray Evidence: Confirmed hydrophobic residues inside, hydrophilic outside.
    • Earlier Belief: Core was highly sensitive—small changes could destabilize protein.

    Recent Research:

    • Study Design: Tested 78,125 amino acid combos at 7 sites in cores of 3 proteins:
      • Human SH3 domain (FYN tyrosine kinase)
      • Barley CI-2A protein
      • E. coli CspA protein
    • Findings:
      • Many changes harmful, but thousands stable (e.g., SH3-FYN had 12,000+ stable conformations).
      • Machine learning accurately predicted stability even with <25% sequence similarity.

    Implications:

    • Protein Engineering: Core modifications may be possible without losing stability—beneficial for therapeutics.
    • Evolutionary Insight: Protein cores may have been more adaptable during evolution than once thought.
    [UPSC 2010] Which one of the following processes in the bodies of living organisms is a digestive process?

    (a) Breakdown of proteins into amino acids * (b) Breakdown of glucose into CO2 and H2O (c) Conversion of glucose into glycogen (d) Conversion of amino acids into proteins.

     

  • WHO classifies Hepatitis D as Carcinogenic

    Why in the News?

    The World Health Organization (WHO) has reclassified hepatitis D virus (HDV) as carcinogenic, following the International Agency for Research on Cancer (IARC) assessment based on data from The Lancet Oncology.

    About Hepatitis D:

    • What is it: Hepatitis D is a serious liver infection caused by the hepatitis D virus (HDV).
    • Cause: Hepatitis D virus (HDV), an incomplete virus needing hepatitis B virus (HBV) for replication.
    • Infection Types:
      • Co-infection – HDV + HBV at the same time.
      • Superinfection – HDV infects someone already with HBV.
    • Transmission: Parenteral exposure (injections, transfusions), mother-to-child, sexual contact.
    • Diagnosis: Blood tests for HDV antibodies and HDV-RNA.
    • Prevention: HBV vaccination, safe blood practices, safe sex, screening, avoid needle sharing.

    Why Hepatitis D is Carcinogenic?

    • Causes more severe liver damage than HBV alone.
    • HBV–HDV co-infection raises liver cancer risk 2–6 times compared to HBV-only cases.
    • Up to 75% develop cirrhosis within 15 years.
    • Can cause cancer even without cirrhosis due to HBV DNA integration + HDV-induced damage.

    Back2Basics: Hepatitis

    • Definition: Liver inflammation from viruses, alcohol, toxins, drugs, autoimmune disorders, or metabolic issues.
    • Viral Types:
      • A – Fecal-oral; acute; vaccine available.
      • B – Blood/body fluids; chronic risk; vaccine available.
      • C – Blood-to-blood; often chronic; no vaccine; treatable with antivirals.
      • D – Discussed above.
      • E – Fecal-oral; usually acute.
    • Chronic B, C, D: Major drivers of cirrhosis and liver cancer.
    • Prevention: Vaccination (A, B), safe injections, screened blood, safe sex, good hygiene.

     

    [UPSC 2019] Which one of the following statements is not correct?

    (a) Hepatitis B virus is transmitted much like HIV. (b) Hepatitis B, unlike Hepatitis C, does not have a vaccine. * (c) Globally, the number of people infected with Hepatitis B and C viruses are several times more than those infected with HIV. (d) Some of those infected with Hepatitis B and C viruses do not show the symptoms for many years.

     

  • Prophylaxis Therapy for Haemophilia

    Why in the News?

    With haemophilia care evolving globally, the shift from reactive to preventive treatment has brought Prophylaxis Therapy to the forefront of modern clinical practice.

    About Haemophilia:

    • What is it: Rare genetic bleeding disorder due to deficiency of clotting factors, mainly Factor VIII (Haemophilia A).
    • Effect: Causes prolonged bleeding, even from minor injuries; can lead to internal bleeds in joints, muscles, or brain.
    • Key Symptoms: Excessive bleeding, painful joint swelling, risk of disability or brain hemorrhage.
    • Prevalence: Estimated 1–1.5 lakh cases in India; only ~29,000 diagnosed (~20%).
    • Underdiagnosis Causes: Low awareness, poor access to diagnostics, and socio-economic challenges.
    • Impact if Untreated: Each untreated bleed may reduce lifespan by ~16 days; leads to pain, disability, missed school/work, and job loss.

    Prophylaxis (Regular Replacement Therapy) and its Benefits:

    • What It Is: Regular infusion of clotting factors or non-factor therapies to prevent bleeds.
    • Global Standard: Replaces on-demand therapy; adopted as best practice in developed countries.
    • Joint Protection: Prevents recurrent bleeds, avoids deformities and long-term disability.
    • Quality of Life: Reduces pain and fear, enables normal schooling, work, and social life.
    • Healthcare Savings: Cuts emergency visits, hospital stays, and long-term costs.
    • Global Status: ~90% of haemophilia patients in developed countries are on prophylaxis.
    • India’s Progress: On-demand remains common; some states offer prophylaxis for children under 10.
    [UPSC 2021] In the context of hereditary diseases, consider the following statements:

    1.Passing on mitochondrial diseases from parent to child can be prevented by mitochondrial replacement therapy either before or after in vitro fertilization of the egg.

    2.A child inherits mitochondrial diseases entirely from the mother and not from the father.

    Which of the statements given above is/are correct?

    Options: (a) 1 only (b) 2 only (c) Both 1 and 2* (d) Neither 1 nor 2