Based on a late-stage trial, Pfizer says its vaccine is more than 91% effective against COVID at least six months after the second dose.
WBZ-TV's Mallika Marshall has more on this story.
Based on a late-stage trial, Pfizer says its vaccine is more than 91% effective against COVID at least six months after the second dose.
WBZ-TV's Mallika Marshall has more on this story.
Herd immunity is slipping away because a quarter of Americans are still refusing to be vaccinated. Veuer’s Chloe Hurst has the..
New data from the CDC says that as many as 5 million Americans have missed or skipped their second dose of the Pfizer or Moderna..