Breakthrough COVID-19 Infections Rare, Usually Result in Asymptomatic or Mild Disease: Walensky

Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, testifies during a U.S. Senate Health, Education, Labor, and Pensions Committee hearing to examine the COVID-19 response, focusing on an update from federal officials, on Capitol Hill in Washington on March 18, 2021. Susan Walsh/Pool via Reuters

People who are fully vaccinated against the virus that causes COVID-19 rarely contract the illness and when they do, it’s typically a no- or low-symptom case, the director of the Centers for Disease Control and Prevention says.

“For those breakthrough infections that can you know rarely occur, for the most part they are resulting in asymptomatic or very mild disease,” Dr. Rochelle Walensky, the CDC’s director, said on MSNBC’s “The Rachel Maddow Show.”