COVID-19(10) SARS-CoV-2(4) SARS-CoV-2.(2) Urban health(2) Stress(2) Epidemiology(2) Well-being.(2) community transmission(1) home-quarantine(1) social distancing.(1) vulnerable communities.(1) climatic association(1) demographic(1) mental health(1) pandemic(1) public health(1) boosted regression tree(1) immunoregulation.(1) Transmission.(1) random forest model(1) Perceptions.(1) diabetes mellitus.(1) cytotoxicity(1) Russia(1) Bangladesh(1) Environmental impact(1) wastewater(1) Stochastic model.(1) environmental(1) transmission wave.(1)