South Africa’s Drop in Virus Cases Adds to Questions About Waves

https://www.wsj.com/articles/south-africas-drop-in-covid-19-cases-adds-to-questions-about-waves-of-infections-11615734003
Epidemiologists were bracing for the worst of the pandemic in South Africa earlier this year, but something surprising happened: Covid-19 cases plummeted with no large vaccination plan or stringent lockdown in place.