A city in Brazil where covid-19 ran amok may be a ‘sentinel’ for the rest of the world

 https://www.technologyreview.com/2020/09/22/1008709/brazil-manaus-covid-coronavirus-herd-immunity-pandemic/?utm_medium=tr_social&utm_campaign=site_visitor.unpaid.engagement&utm_source=Facebook#Echobox=1601090415