Pfizer study tests extra COVID vaccine dose for kids under 5
Pfizer said Friday it was changing plans and testing three doses of its COVID-19 vaccine in babies and preschoolers instead of the usual two. The addition of an extra dose came aft…
Pfizer said Friday it was changing plans and testing three doses of its COVID-19 vaccine in babies and preschoolers instead of the usual two. The addition of an extra dose came aft…