Novavax can finally breathe a sigh of relief – at least a small one. The Food and Drug Administration approved the company's Covid-19 vaccine after more than a month of delay b

After a six-week delay, the US Food and Drug Administration has approved Novavax’s Covid-19 vaccine, according to a letter from the agency, but only for people 65 and older and those 12 and up who have at least one underlying condition that puts them at higher risk of severe illness.

Novavax Inc. jumped as US regulators fully approved its Covid vaccine, easing investors’ concerns after the clearance was delayed and US Health and Human Services Secretary Robert F. Kennedy Jr. raised doubts about its efficacy.