Infectious SARS-CoV-1 and SARS-CoV-2 remain viable up to 72 h after inoculation on plastic and stainless steel, whereas both are inactivated on copper in less than 4 or 8 h, respectively, and on cardboards in less than 24 and 8 h, respectively.153 Therefore, the stability of both viruses is similar, and we can hypothesize that surface treatments with NPs that proved to be effective for SARS-CoV-1 could possibly also be effective for SARS-CoV-2.