The US has bought up virtually all stocks of a drug shown to work against Covid-19 - raising fears Brits won't be able to get hold of it until autumn.
The decision by the Trump administration has sparked fury with leading scientists who have raised concerns over "fair access" to remdesivir.
The anti-viral drug was originally developed for use against Ebola but trials showed that it helped patients hospitalised with coronavirus recover almost a third faster.
Health Secretary Matt Hancock hailed it the "biggest step forward" in treating Covid-19 when it was given approval for use on the NHS in May.
But now there are concerns patients in the UK won't get widespread access to the treatment after the US bought more than 500,000 doses.
It makes up the entire global supply for July and 90 per cent of stocks for August and September.
Trump buys up ENTIRE stock of coronavirus drug remdesivir – sparking fury among medics
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