• Scientists have developed a Covid-19 vaccine that could offer protection against not only existing and future strains of the SARS-CoV-2 coronavirus.
  • The vaccine costs $1 a dose. It uses the plasmid of E-coli bacteria to produce the vaccine.
  • A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate independently.

  • They are most commonly found as small circular, double-stranded DNA molecules in bacteria; however, plasmids are sometimes present in archaea and eukaryotic organisms.
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