There was evidence as early as the last month of 2020 that people who had received COVID-19 vaccines could still get COVID-19, Dr. Deborah Birx said on June 23.
“We knew early on in January of 2021, in late December of 2020, that reinfection was occurring after natural infection,” Birx, the White House COVID-19 response coordinator during the Trump administration, said before a congressional panel.
“And because the vaccine was based on natural immunity, you cannot make the conclusion that the vaccine will do better than natural infection,” she added later.
The two primary COVID-19 vaccines, produced by Pfizer and Moderna, are based on messenger RNA technology and are designed to trigger an immune response similar to the response that is triggered by an infection….