Too soon to say if Americans may need vaccine booster: Fauci

WASHINGTON  - The top U.S. infectious diseases expert said Sunday "it is entirely conceivable, maybe likely” that Americans will need a booster dose of the COVID-19 vaccine in the coming months, but it is too soon for the government to recommend another shot.

Dr. Anthony Fauci, who is President Joe Biden's chief medical adviser, said the Centers for Disease Control and Prevention and the Food and Drug Administration did the right thing last week by pushing back against drugmaker Pfizer’s assertion about a booster within 12 months. Hours after Pfizer's statement Thursday that it would seek authorization for a third dose, the two agencies said they did not view the booster shots as necessary "at this time.” Fauci said clinical studies and laboratory data have yet to fully bear out the need for a booster to the current two-shot Pfizer and Moderna vaccines or the one-shot Johnson & Johnson regimen.