Pfizer CEO Albert Bourla announced he had COVID-19, despite having received four doses of the Pfizer-BioNTech vaccine.

Several public figures who took multiple doses of the vaccine have still caught the COVID flu in the past few months including US President Joe Biden and his chief medical adviser, Dr. Anthony Fauci, and the U.S. Defense Secretary Lloyd Austin.
On 1 April 2021, Bourla wrote a tweet celebrating that the Pfizer-Biontech vaccine was “100% effective” in preventing COVID-19.
