Coronavirus: Professor infects himself twice, refutes herd immunity

Dr Alexander Chepurnov, 69, from Siberia, Russia, reinfected himself with Covid-19 after recovering from the killer virus without requiring hospitalisation when he caught it the first time in February. https://www.dailymail.co.uk/news/article-8889269/Russian-professor-69-infected-Covid-19-twice-says-herd-immunity-impossible.html?ns_mchannel=rss&ns_campaign=1490&ito=1490