Johnson and Johnson says single-shot COVID-19 vaccine is 66 percent effective

Johnson and Johnson says single-shot COVID-19 vaccine is 66 percent effective


Photo by JUSTIN TALLIS/AFP via Getty Images

A single shot of the Johnson and Johnson COVID-19 vaccine can prevent 85 percent of severe cases of the disease, the company announced today. Overall, it is 66 percent effective against both moderate and severe cases of disease.

“We’re 85 perfect effective at preventing severe disease, which we define as disease that makes you feel particularly sick at home, or may go to the hospital, or worse,” Mathai Mammen, global head of research and development at Johnson and Johnson, told CNN. The company plans to file for emergency authorization next week.

The efficacy is lower than that of the two COVID-19 vaccines already authorized for use in the United States, which prevent about 95percent of symptomatic cases of COVID-19. Those vaccines…

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