The Sinovac vaccine is yet to finish late-stage trials, but is already being shipped to other countries.
Poorer nations will miss out despite steps to ensure access is fair, campaigners warn.
And how to immunise yourself against the spread of fake news about what medicines work.
American regulators are yet to approve the vaccine, despite the UK pushing ahead with mass rollout.
Hospital hubs across the UK are preparing to give the Pfizer/BioNTech vaccine to the over-80s and some health staff.
More than 200 people are in hospital in Andhra Pradesh state because of an unidentified illness.
Military personnel could transport doses of virus vaccine to ensure supplies, a minister says.