The United States has struck a deal to buy almost the entire world supply of a drug that’s known to help people recover from Covid-19.
In trials carried out in the UK and elsewhere the medicine – Remdesivir – was found to reduce the time spent in hospital for seriously ill patients.
It’s one of only two drugs known to be effective in treating the virus.
Huw Edwards presents BBC News at Ten reporting by Medical Correspondent Fergus Walsh.
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