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Covid-19 Vaccine Booster Shots

  • 10 Jul 2021
  • 2 min read

Why in News

Recently, Pfizer and BioNTech have announced that they would seek regulatory authorization for a third booster dose of their Covid-19 vaccine (BNT162b2).

Key Points

  • Booster Shots:
    • A booster is a means of strengthening one’s immune system against a particular pathogen.
    • It may be exactly the same original vaccine, in which case its goal is to increase the magnitude of protection by producing more antibodies.
    • Scientists can also tweak what goes into the booster if they are aiming to protect people from a new variant — a version of the virus that’s mutated significantly from the original version people were vaccinated against.
    • These shots are only for the fully-vaccinated.
  • Need:
    • These boosters will be particularly helpful for the elderly and immunocompromised people whose bodies were unable to mount a robust protection against the virus following the first two shots.
    • Secondly, if there are studies showing that a new variant can sneak past the antibodies created by a specific vaccine, the need of a tweaked booster shot arises then.
  • Concerns:
    • Booster shots are yet to get a nod from the World Health Organisation (WHO).
    • In fact, the WHO has expressed caution in encouraging third doses.
    • Such a recommendation is unnecessary and premature given the paucity of data on booster shots and the fact that high-risk individuals in much of the world still haven’t been fully vaccinated.

Source: IE

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