Third 'booster' shot likely needed of Pfizer and Moderna vaccines News 12 Staff Updated on:Apr 16, 2021, 12:33pm EDT People who received Pfizer or Moderna vaccines will likely need a third dose, according to company officials. Albert Bourla, CEO of Pfizer, in an interview released Thursday said "Likely scenarios is there will likely be a need for a third dose somewhere between six and 12 months and then from there, there will be an annual vaccination." The head of Pfizer also said that an annual shot will likely be needed as well. Medical experts say that, like the flu, the COVID-19 virus will never stop mutating, which is partially why a booster shot will