https://naked-science.ru/article/sci/uchenye-opredelili-uroven-vlazhnosti-vozduha-pri-kotorom-zamedlyaetsya-peredacha-koronavirusa?_gl=1*rlsimx*_ga*MXE4blhfTm1lNDVGcjNENFBYcHZZYzV6aEN2N01wVHRNSmJMZWxiWWY0SFdaMnJJZzh3TzlZaDIwa3JrdjFIWg..