Review of COVID studies links increased death to hydroxychloroquine plus azithromycinA systematic review and meta-analysis of studies involving COVID-19 patients treated with hydroxychloroquine found that the antimalaria drug alone was not associated with reduced mortality in hospitalized patients, but when combined with the antibiotic azithromycin it was linked with significantly increased mortality, European researchers reported yesterday in Clinical Microbiology and Infection.The researchers looked at 29 studies published up until Jul 25, including 3 randomized controlled trials (RCTs) and 1 non-randomized trial.