J&J’s Covid-19 Vaccine Is Safe and Effective, FDA Says, Paving Way for Approval

The U.S. Food and Drug Administration found that a Johnson & Johnson Covid-19 single-dose vaccine was 66.1% effective in preventing moderate to severe virus disease, and that it had a “favorable safety profile.”

In the company's clinical study of about 44,000 patients in the U.S., South Africa and other countries, the agency said, there were seven Covid-19 deaths among patients getting a placebo, and none among those who got the vaccine.

The finding appears to bolster J&J’s earlier statements that the vaccine was effective in preventing severe disease.

The federal...