Pfizer Exec Concedes COVID-19 Vaccine Was Not Tested on Preventing Transmission Before Release

A health care worker in Israel prepares a dose of the Pfizer-BioNTech vaccine in a file photo. Ahmad Ghababli/AFP via Getty Images

A Pfizer executive said Oct. 10 that neither she nor other Pfizer officials knew whether its COVID-19 vaccine would stop transmission before entering the market last year.

Member of the European Parliament, Rob Roos, asked during a session: “Was the Pfizer COVID vaccine tested on stopping the transmission of the virus before it entered the market?”