ZURICH: The World Health Organization (WHO) on Tuesday (May 26) promised a swift review of data on hydroxychloroquine, probably by mid-June, after safety concerns prompted the group to suspend the malaria drug's use in a trial on COVID-19 patients.

US President Donald Trump and others have pushed hydroxychloroquine as a possible coronavirus treatment, but the WHO on Monday called time in its multi-country trial, called Solidarity.