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GENEVA • The World Health Organisation (WHO) has suspended the testing of the malaria drug hydroxychloroquine in Covid-19 patients because of safety concerns, according to its director-general Tedros Adhanom Ghebreyesus.

Hydroxycholoroquine has been touted by US President Donald Trump and others as a possible treatment for the disease caused by the coronavirus. Mr Trump has said he was taking the drug to help prevent infection.