Coronavirus latest: doubts cast over drug trials; Singapore-China corridor to reopen

Serious concerns have been raised by dozens of scientists into a major study of hydroxychloroquine and chloroquine, and their potential use in treating Covid-19.One of the main concerns was a lack of information about the countries and hospitals that contributed to the data, and a questionable ratio of drugs used in the trial.The use of hydroxychloroquine to treat coronavirus became extremely high-profile after the US president said he had been using the drug.Elsewhere on Friday, it was…

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