British pharmaceutical company AstraZeneca says it now has capacity to deliver two billion doses of its potential coronavirus vaccine over the next two years.
The number is twice what the company had originally promised, an increase due to new deals with the Serum Institute of India and two Bill Gates-backed organisations.
AstraZeneca chief executive Pascal Soriot said on Thursday that the firm would consider more partnerships over the next few months, with the potential to expand production beyond two billion doses.
It is all, however, dependent on proof a vaccine is effective in protecting against coronavirus.
AstraZeneca and Oxford University have been working together on a possible vaccine and are thought to be among the front runners in a global race.
Mr Soriot said he expected to know by August whether the vaccine works, adding: