The virus stability on surfaces depends on the composition of the infected material, with inactivation in <3 h on printing and tissue paper, in <2 days on treated wood and cloth, in <4 days on glass and banknotes, and in <7 days on stainless steel and plastic.152 Conversely, active viruses can remain on the outer layer of a surgical mask even after 7 days.152 The surface and aerosol stability of SARS-CoV-2 is comparable to that of SARS-CoV-1,153 with both viruses remaining viable in contaminated aerosols for more than 3 h.