The US Food and Drug Administration has discussed with vaccine-maker Novavax the need for an additional trial of its Covid-19 vaccine as a post-approval commitment, a source familiar with the matter told CNN.

(Reuters) -Federal regulators have asked Novavax to complete an additional clinical trial on its COVID-19 vaccine after previously delaying approval, the Wall Street Journal reported on Friday, citing people familiar with the matter.

Novavax announced that it's COVID-19 vaccine could get full approval from the U.S. Food and Drug Administration soon.The update sent Novavax’s stock up above 21% in early trading. In addition, it assisted calm feats that the decision