The World Health Organization hopes hundreds of millions of doses of coronavirus vaccine can be produced this year and 2 billion doses by the end of 2021, chief scientist Soumya Swaminathan said on Thursday.
The WHO is drawing up plans to help decide who should get the first doses once a vaccine is approved, she said.
Priority would be given to frontline workers such as medics, those who are vulnerable because of age or other illness, and those who work or live in high-transmission settings such as prisons and care homes.