10,000 COVID Infections Reported in Fully Vaccinated People So Far, CDC Says

The Centers for Disease Control and Prevention (CDC) announced its findings on Tuesday that show over 10,000 vaccine breakthrough infections had been reported as of April 30 out of approximately 101 million Americans who had been fully vaccinated against COVID-19.

The CDC's data showed a total of 10,262 vaccine breakthrough infections from 46 U.S. states and territories out of about 101 million people who had been fully vaccinated by the time of the April 30 findings.

Among these cases, 6,446 (63 percent) of the breakthrough infections occurred in females, and the median patient age was 58 years.

Furthermore, 2,725 (27 percent) of these infections were asymptomatic, 995 (10 percent) of patients were known to be hospitalized, and 160 (2 percent) patients died.

Among the 995 hospitalized patients in the report, 289 (29 percent) were asymptomatic or hospitalized for a reason unrelated to COVID-19. The median age of patients who died was 82 years, and 28 (18 percent) were asymptomatic or died from a cause unrelated to COVID-19.

The findings noted undercounting of the breakthrough infections is likely due to the national surveillance system relying "on passive and voluntary reporting, and data might not be complete or representative." The CDC said that many people with vaccine breakthrough infections, especially those who are asymptomatic or who experience only mild symptoms, might not seek testing.

In the announcement posted online about the findings, the CDC also state that on May 1 the agency had transitioned from monitoring all reported COVID-19 vaccine breakthrough infections to investigating only breakthrough infections among patients who are hospitalized or die. The CDC wrote the move would allow it to focus on cases with that had the "highest clinical and public health significance."

The agency also said it will continue to conduct studies in multiple U.S. sites to evaluate vaccine effectiveness.

The release also contained the following statement in regards to vaccinations: "Even though FDA-authorized vaccines are highly effective, breakthrough cases are expected, especially before population immunity reaches sufficient levels to further decrease transmission. However, vaccine breakthrough infections occur in only a small fraction of all vaccinated persons and account for a small percentage of all COVID-19 cases. The number of COVID-19 cases, hospitalizations, and deaths that will be prevented among vaccinated persons will far exceed the number of vaccine breakthrough cases."

Update 05/25/21 12:40 p.m. EDT: to include more information from the CDC's findings on vaccine breakthrough infections.

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A stock image shows a mock COVID vaccine. The CDC reported Tuesday of more than 10,000 cases of breakthrough COVID infections in fully vaccinated people. Getty