Moderna to Ask Health Regulators to Authorize Its Covid-19 Vaccine

Moderna Inc. MRNA 16.13% said it will on Monday ask U.S. and European health regulators to authorize use of the company’s Covid-19 vaccine, after it was shown to be 94.1% effective in a full analysis of a pivotal study.

The timing keeps the vaccine on track to become possibly the second to go into use in the U.S. by year’s end—after one already under regulatory review from Pfizer Inc. and BioNTech SE —with inoculation available to the general public likely in spring or summer.

In the 30,000-person trial, 196 subjects...