In a rare weekend press conference, the U.S. Food and Drug Administration (FDA) -- who is responsible for authorizing widespread use of Pfizer’s coronavirus vaccine on Friday -- discussed some of people’s biggest concerns about the vaccine. Amid two recent cases of allergic reactions to Pfizer’s coronavirus vaccine in the U.K., FDA officials addressed concerns about individuals with a history of allergic reactions receiving the vaccine. FDA officials said Saturday that they’ve followed that process when reviewing Pfizer’s vaccine, and they feel confident that it is safe for this age group to receive the shots. During Saturday’s news briefing, officials made it clear that pressure from the White House did not force the FDA to authorize use of the vaccine too early. More: Report: White House to FDA chief: Approve Pfizer vaccine Friday or quit“We’re going to maintain the integrity of the scientific process,” Hahn added.