“…Although the pandemic situation has significantly improved air quality ( Agarwal et al, 2021 ), reduces greenhouse gases emission ( Kumar et al, 2022 ), reduces the pressure on the tourist destinations (which may assist with the restoration of the ecological system) ( Gössling et al, 2020 ), the increase of plastic ( Silva et al, 2021 ) and medical wastes ( Parikh & Rawtani, 2022 ), haphazard use and disposal of disinfectants, mask, and gloves ( Amuah et al, 2022 ); and burden of untreated wastes ( Rume, Islam 2020 ), imply significant environmental risks. If this were not enough, the detection of viral particles of SARS-CoV-2 in aquatic environments, especially from domestic and hospital sewage ( Gonçalves et al, 2021 , Achak et al, 2021 , Crank et al, 2022 , Amoah et al, 2022 , Domokos et al, 2022 , Galani et al, 2022 ), has imposed new challenges on environmental and health managers. These studies raise not only the possibility of river resources acting as secondary sources of transmission of the disease among individuals ( Liu et al, 2020 , Giacobbo et al, 2021 , Thakur et al, 2021 ), as well as warn about the potential threat of the dispersion of the new coronavirus or its fragments to the biota ( Charlie-Silva & Malafaia, 2022 ).…”