On plastic and stainless steel, viable virus could be detected after three days. That means that after another hour and six minutes, three quarters of the virus particles will be essentially inactivated but 25% will still be viable. On stainless steel, it takes 5 hours 38 minutes for half of the virus particles to become inactive. On cardboard, the half-life was about three and a half hours, but the researchers said there was a lot of variability in those results "so we advise caution" interpreting that number. The shortest survival time was on copper, where half the virus became inactivated within 46 minutes.

Source: bd News24 March 17, 2020 19:18 UTC