FDA Recommends Updated COVID-19 Vaccines Due to Waning Effectiveness
The U.S. Food and Drug Administration (FDA) on June 3 recommended updating the formulation of the COVID-19 vaccines because of studies that indicate their effectiveness is worse against circulating variants of SARS-CoV-2, the virus that causes COVID-19. “In prior years there appears to have been an inverse relationship between the time since vaccination and vaccine […]