The agency is changing the standard of evidence required for Covid-19 vaccine approval in the US, Dr. Vinay Prasad, the new director of the FDA’s Center for Biologics Evaluation and Research, and FDA Commissioner Dr. Marty Makary, said in an editorial published Tuesday in the New England Journal of Medicine

The U.S. Food and Drug Administration approved Novavax's COVIDd-19 vaccine with age restrictions after a six-week delay.

Novavax shares surged more than 17% before the bell on Monday, following the long-delayed approval of its COVID-19 vaccine from the U.S. health regulator, albeit with new conditions.