Worldwide COVID-19 death toll tops a staggering 3 million AOLMore Exercise Linked to Lower Chance of Severe COVID-19: Study MedscapeYou're not imagining it – 3 ways COVID-19 has been extra hard on American parents The Conversation USStudy shows past COVID-19 infection doesn't fully protect young people against reinfection EurekAlertDogs can sniff out positive coronavirus samples with 96% accuracy - study The Jerusalem PostView Full Coverage on Google News