Dr. Rochelle Walensky, director of the US Centers for Disease Control and Prevention, tested positive for Covid-19 Friday.Walensky is experiencing mild symptoms and is up-to-date on her Covid-19 vaccines, according to a statement released by the agency. Walensky received an updated Covid-19 booster in September.

“Consistent with CDC guidelines, she is isolating at home and will participate in her planned meetings virtually,” the agency said. “CDC senior staff and close contacts have been informed of her positive test and are taking appropriate action to monitor their health.”

Covid-19 cases have been falling as the United States moves into fall. However, experts say cases may begin to climb as they have during the past two pandemic winters – especially as several new coronavirus variants begin to gain traction. People who are boosted have more protection against Covid-19 illness and even infection compared to people who are past due for a booster shot — and significantly more protection than those who haven’t been vaccinated at all, past studies suggest.

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