Symptomatic breakthrough COVID-19 infections rare, CDC data estimates - ABC News

Although reports of breakthrough COVID-19 cases occurring among fully vaccinated Americans are garnering much attention, as the country experiences a viral resurgence, new data illustrates just how rare these breakthrough infections are likely to be, and further shows that the vast majority of those becoming severely ill are the unvaccinated.

With more than 156 million Americans fully vaccinated, nationwide, approximately 153,000 symptomatic breakthrough cases are estimated to have occurred as of last week, representing approximately 0.098% of those fully vaccinated, according to an unpublished internal Centers for Disease Control and Prevention document obtained by ABC News.

“The risk to fully vaccinated people is dramatically less than that to unvaccinated individuals.

And the more vaccinated people there are, the more breakthrough cases we’ll see,” he added.

Confirmed cases among Massachusetts residents, stemming from the Provincetown cluster, have been found to be predominantly symptomatic, with 69% of affected individuals reported to be fully vaccinated, according to local officials.

A total of 80 of these breakthrough cases resulted in death, representing 0.0015% of individuals fully vaccinated -- and 272 cases resulted in hospitalization, representing 0.006% of those fully vaccinated.

Department of Health, said during a Thursday press conference that the district had 200 fully vaccinated breakthrough cases of COVID-19, out of a total record nearly 376,000 fully vaccinated people, representing “only point .05 percent, which just strengthens our confidence on how great these vaccines are.”.

And in New Jersey, the total number of breakthrough cases, so far, is 5,678 out of a total of 4.8 million people vaccinated by July 12, according to state data.

"It is important to point out that 49 deaths due to COVID-19 among 4.8 million fully vaccinated state residents is slightly greater than one in 100,000 fully vaccinated individuals.