GENEVA: Moderna's COVID-19 vaccine is being reviewed on April 30 by technical experts for possible WHO emergency use listing, a World Health Organization spokesman told Reuters.

"We are discussing the Moderna COVID-19 vaccine on Friday 30 April 2021,” WHO spokesman Christian Lindmeier said in reply to a query. A decision on the U.S. drugmaker's vaccine was expected in one to four days after that, he said.

So far COVID-19 vaccines made by Pfizer, AstraZeneca and Johnson & Johnson have already received WHO approval, which is a signal to national regulatory authorities on a product's safety and efficacy.