CDC Stealth-Edits Page on Messenger RNA COVID-19 Vaccines

The Centers for Disease Control and Prevention headquarters in Atlanta, Ga., on April 23, 2020. Tami Chappell/AFP via Getty Images

The U.S. Centers for Disease Control and Prevention stealthily edited a webpage it maintains that lists details about messenger RNA (mRNA) COVID-19 vaccines.

The page, titled “Understanding mRNA COVID-19 Vaccines,” says it was last updated on July 15. But archived versions of the page show that key portions were removed on July 22 or July 23.