UNDATED (AP) — Pfizer says it is about to seek U.S. authorization for a third dose of its COVID-19 vaccine. The company said Thursday that another shot could dramatically boost immunity and maybe help ward off the latest worrisome coronavirus mutant. Research from multiple countries shows the widely used COVID-19 vaccines offer strong protection against the highly contagious delta variant. But virus-fighting antibodies naturally wane. Pfizer says early data from a company trial suggests people’s antibody levels jump after they get a third dose. But the filing doesn’t mean third doses would be rolled out any time soon. Public health officials would have to decide if they’re really needed.
Photo: Used syringes with the Pfizer-BioNTech and Moderna COVID-19 vaccine are seen discarded in a biohazard trash container at a COVID-19 vaccination site at NYC Health + Hospitals Metropolitan, Thursday, Feb. 18, 2021, in New York. (AP Photo/Mary Altaffer)
