If you’ve had COVID-19 and you received two doses of the Pfizer-BioNTech vaccine, should you still get a booster if you are eligible? The answer is yes, according to Michael Lin, MD, MPH, an infectious...

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Most side effects after a third dose of a COVID vaccine are mild or moderate, and occur at about as often as after shot two, a US study showed Tuesday in a finding that was expected but nonetheless reassuring. The...

The drugmaker Pfizer recently announced that vaccinated people are likely to need a booster shot to be effectively protected against new variants of covid-19 and that the company would apply for Food and...

Pfizer now says it is developing booster shots amid fears its COVID-19 vaccine is less effective against the highly-infectious variants from Brazil and South Africa Pfizer CEO Albert Bourla said Tuesday...