The European Commission has said there is no evidence that a drug touted by US President Donald Trump as a potential miracle cure against Covid-19 is effective against the disease.

“The efficacy of hydroxychloroquine in the treatment of Covid-19 patients has to date not been proved,” a spokesman for the European Commission said, relaying an internal opinion from the European Medicine Agency.

The spokesman said there was also no evidence either of the positive effects of chloroquine, another malaria drug, which is also being tested for its possible use against Covid-19.

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