Occurrence and transmission potential of asymptomatic and presymptomatic SARS-CoV-2 infections: A living systematic review and meta-analysis PLoS BlogsResearchers hypothesize coronavirus immunity from dengue exposure Fox NewsCOVID-19 and HIV: So far, it seems the outcome is not what was feared Medical Xpress1 in 5 COVID-19 Cases Are Asymptomatic but Can Spread the Disease HealthlineThe virus causing COVID-19 most likely evolved in natural wildlife populations before spreading to humans Health FeedbackView Full Coverage on Google News