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How common and severe is breakthrough infection after vaccination against Covid-19?

Asked by Anonymous 

Of the more than 95 million people in the United States who were fully vaccinated, only 9,245 — or 0.01 percent — have been infected with the coronavirus as of April 26, according to the CDC. Just over a quarter of those people never had symptoms; 132 people, or 1 percent of the breakthrough infections, died. Twenty of those deaths were in asymptomatic people or probably not related to COVID-19.

There is some evidence that vaccination may make illness less severe.


ICMR estimates breakthrough infection in India to be around 4.5% and has not recorded deaths post-vaccination.