Вообще-то, все. https://www.euronews.com/2020/05/11/europe-warned-of-second-waves-of-covid-19https://www.dw.com/en/coronavirus-when-will-the-second-wave-of-infections-hit/a-53435135https://www.sciencealert.com/senior-medical-advisor-warns-china-may-now-face-a-second-wave-of-covid-19https://www.businessinsider.com/second-wave-of-coronavirus-infections-may-peak-in-fall-2020-5?r=US&IR=T