“… Di Maria et al (2021) detected SARS -CoV -2 RNA on 15% of 1175 samples of solid waste such as plastic coffee cups, plastic glasses, beverage cans, and plastic bottles that contained saliva with a viral load ranging from 4.8 × 10 3 to 4.0 × 10 6 genome copies/swab. Pertaining to medical waste materials, SARS-CoV-2 RNA has been detected on outer surface of medical waste bags ( Lv et al, 2021 ) , surgical masks ( Hu et al, 2020 ; Pasquarella et al, 2020 ; Dargahi et al, 2021 ), PPE of health care worker ( Peyrony et al, 2020 ), used gloves ( Ye et al, 2020 ), PPE of medical staff including aprons and face shields ( Krambrich et al, 2021 ) and outer part of the N-95 masks ( Dargahi et al, 2021 ). In the above studies, only Hu et al (2020) and Krambrich et al (2021) tested viral infectivity.…”