Pfizer stalls COVID-19 vaccine app as it awaits data on third dose in young kids

Parents may have to wait several weeks longer before they can get their youngest children vaccinated with Pfizer and BioNTech’s mRNA-based COVID-19 vaccine.

Pfizer on Friday said it would extend its rolling FDA submission in anticipation of data on a third dose of its COVID-19 vaccine in children younger than 5. Just earlier this month, on Feb. 1, the company filed its emergency use authorization application at the agency's request. That request covered the two-dose regimen, and the company said at the time that data for the planned three-dose series would be expected in the coming months.