CDC head warns unauthorized boosters undermine safety monitoring

Rochelle Walensky, director of the Centers for Disease Control and Prevention, warned Thursday that Americans getting unauthorized booster shots of the COVID-19 vaccine undermine the CDC's safety monitoring of recipients. Why it matters: With booster shots a near inevitability, many Americans are eager to know when they will be able to get one. Some are now circumventing official CDC guidelines and getting a third shot. Driving the news: More than 1 million people in the U.S. have received unauthorized booster shots of the Moderna or Pfizer vaccines, ABC News reported Tuesday.