New data suggests two Johnson & Johnson shots, given two months apart, results in 94% protection against any symptomatic COVID infection in the U.S., and 100% against severe disease.
Compared to the Pfizer and Moderna vaccines, Johnson & Johnson's single-shot vaccine always had slightly lower efficacy. Peak efficacy from the two-shot Pfizer and Moderna vaccines was 95% and 94%, respectively, against symptomatic illness.
All three currently authorized vaccines are still working well to dramatically reduce the risk of being hospitalized, but as months pass and with the emergence of new COVID-19 variants, the vaccines are losing their power to prevent more mild breakthrough infections. PHOTO: FILE - In this July 30, 2021, file photo, Jay Vojno gets the Johnson & Johnson COVID-19 vaccine, in New York.
MORE: Johnson & Johnson vaccine seems to stand up against delta variant, preliminary research suggests
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