May 5 Children’s National opens vaccine waitlist for children 12 and up in anticipation of Pfizer authorization
April 28 Pfizer and Moderna vaccines reduce Covid-19 hospitalization risk by 94% among older adults, CDC study says
April 15 Una tercera dosis de la vacuna contra el covid-19 podría ser necesaria en un plazo de 6 a 12 meses, dice el director ejecutivo de Pfizer
