The World Health Organization said Wednesday that it would launch a multiarm, multicountry clinical trial for potential coronavirus therapies, part of an aggressive effort to jumpstart the global search for drugs to treat Covid-19.

Four drugs or drug combinations already licensed and used for other illnesses will be tested, said WHO Director-General Tedros Adhanom Ghebreyesus. Ten countries have already indicated they will take part in the trial.

The mere fact the WHO is sponsoring the trial suggests that efforts in China to test these drugs may not have come up with enough data to indicate whether any were of use to prevent patients from developing severe disease or save those with severe disease from death….

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