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