Pfizer Exec Confirms to EU Lawmakers COVID-19 Vaccine Not Tested on Preventing Transmission

Members of the European Parliament take part in a voting session during a plenary session at the European Parliament in Strasbourg, eastern France, on March 12, 2025. (Photo by FREDERICK FLORIN / AFP) Photo by FREDERICK FLORIN/AFP via Getty Images

A Pfizer executive told European lawmakers on  Oct. 10 that neither she nor other Pfizer officials knew whether its COVID-19 vaccine would stop transmission before entering the market last year, in keeping with previous indications that clinical trials were limited to the impact of vaccines on symptomatic COVID-19.

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?”