The World Health Organisation is preparing its guidelines on the use of the drug remdesivir to treat Covid-19, and should be able to release it in three to four weeks, Reuters quoted the WHO's top official for clinical care responses as saying.

“We would anticipate that the guidelines will be available within three to four weeks,” Janet Diaz told a news conference.

A WHO panel “will convene next week to look at the totality of the evidence” of the effectiveness of the drug, made by Gilead Sciences.

On Thursday, the US Food and Drug Administration approved Remdesivir for the treatment of coronavirus infection — the first drug to be approved for treating Covid-19