How effective is the Pfizer booster vaccine?
Recent analysis by the UK Government’s Health Security Agency has found those who receive a booster jab remain up to 70 percent protected against COVID-19.
Despite passing initial tests for its suitability as a booster shot, the Pfizer vaccine has since been challenged for its effectiveness against the new Omicron variant.
A small study has found Pfizer may be up to 40 times less effective against the Omicron coronavirus variant than the first strain of Covid.
Carried out by Professor Alex Sigal, a professor at the Africa Health Research Institute, concerns over a “very large drop” in immunity against the new variant among those given Pfizer’s vaccine were also raised.
However, this study sample only involved 12 vaccinated people, so more data is needed to prove this on a real-world scale.
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