U.S. health officials have confirmed fewer than 6,000 cases of Covid-19 in fully vaccinated Americans, CDC Director Rochelle Walensky said.

U.S. health officials have confirmed there have been fewer than 6,000 documented cases of Covid-19 in fully vaccinated Americans, Centers for Disease Control and Prevention (CDC) Director Dr. Rochelle Walensky said Monday.

That represents just 0.007% of the 84 million Americans who have been fully vaccinated. Furthermore, none of the patients has died or gotten severely ill, Walensky said.

“With any vaccine, we expect such rare cases, but so far out of more than 84 million people who were fully vaccinated, we have only received reports of less than 6,000 breakthrough cases,” Walensky told reporters at a press briefing.

“Although this number is from 43 states and territories and likely and underestimate, it still makes a really important point, these vaccines are working,” she added.

Half of all American adults have received at least one dose of the coronavirus vaccine. Of those age 65 and older, 81% have received one dose or more and about two-thirds are fully vaccinated.