Researchers investigated an herbal combination of four African medicinal plants known as PHELA as a potential therapy for COVID-19. In vitro testing found that PHELA inhibited > 90% of SARS-CoV-2 and SARS-CoV infection as well as close to 100% of MERS-CoV infection. In silico docking studies showed strong binding energy interactions between compounds in PHELA and SARS-CoV-2 proteins. PHELA has potential as a COVID-19 therapeutic.