26 May 2020 - The World Health Organisation has announced a temporary pause on a clinical trial arm testing hydroxycholoroquine on safety concerns.
The move follows publication in The Lancet of an observational study on hydroxycholoroquine and chloroquine and its effects on COVID-19 patients that have been hospitalised.
According to the study authors there was a higher estimated mortality rate among patients receiving the drug, when used alone or with a macrolide.