Up to 30,000 people could have used experimental treatments or vaccines so far in the world's worst outbreak of Ebola currently plaguing West Africa, British scientists said on Wednesday.
The calculation highlights the dilemma facing officials considering how to distribute the tiny quantities of unproven drugs that are likely to be available in the near term to fight the deadly disease.
The World Health Organisation is hoping for improved supplies of experimental treatments and progress with a vaccine by the end of the year, after last week backing the use of untested drugs and vaccines.