Pfizer to Ask US Regulators to Authorize Second Booster Due to Waning Effectiveness: CEO

Pfizer CEO Albert Bourla talks during a press conference at the factory of Pfizer in Puurs, Belgium, on April 23, 2021. John Thys/Pool via Reuters

Pfizer plans to ask U.S. regulators to grant emergency use authorization for a second booster of its COVID-19 vaccine, CEO Albert Bourla said March 11.

“Clearly there is a need in an environment of Omicron to boost the immune response,” Bourla said on CNBC’s “Squawk Box.”