So-called breakthrough cases of COVID-19 among vaccinated people remain rare (and are generally less serious when they do occur), despite the surge of the hypercontagious Delta variant.
, have put a spotlight on breakthrough cases and raised questions about the continued effectiveness of vaccines in the face of the Delta threat.“We may have been giving a message that sounds like the vaccines aren't working very well, which to me can scare the vaccinated and actually doesn't make the unvaccinated think they should get a vaccine,” Dr. Monica Gandhi, an infectious disease specialist and professor of medicine at the University of California, San Francisco, told Yahoo News.
During the time frame when the data was collected — between April 4 and July 17 — only 46,312 cases were reported among fully vaccinated people, compared with 569,142 of COVID-19 cases among people who were not fully vaccinated. Hospitalized or fatal COVID-19 vaccine breakthrough cases also remained uncommon.
Breakthrough cases are to be expected, as no vaccine is “100 percent effective at preventing illness,” according to the CDC. In addition, not everyone is able to build a robust immune response to the shots. This is particularly true for those who are immunocompromised, haveAs of Aug. 30, people 65 and older represented about 70 percent of the breakthrough cases reported to the CDC that resulted in hospitalization.
The good news for most healthy vaccinated people is that the vaccines are continuing to protect them from severe illness, and even a breakthrough infection will result in mild symptoms or none at all.
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