Trial and error: How scientists studied drugs touted to treat COVID-19 Eyewitness News looks back on one of the drugs that was famously touted - even by people in influence - as part of a treatment regimen for COVID-19. Remdesivir, which previously failed in trials against Ebola, is being touted as helping to improve outcomes against the COVID-19 illness. Picture: AFP CAPE TOWN - Last year on this day, the World Health Organization declared COVID-19 a pandemic. At the time, the virus - thought to have originated in China - had infected more than 100,000 people and was detected in over 110 countries.