The results are from WHO's "Solidarity" trial, which evaluated the effects of four potential drug regimens, including remdesivir, hydroxychloroquine, anti-HIV drug combination lopinavir/ritonavir and interferon, in 11,266 adult patients across more than 30 countries. The study found the regimens appeared to have little or no effect on 28-day mortality or the length of the in-hospital course among patients hospitalized with COVID-19, the WHO said on Thursday. The results of the trial are yet to be reviewed and were uploaded on the preprint server medRxiv.