Reposting: I want to clarify since - I’m seeing these 🦠 rumors float around. You most likely cannot catch the coronavirus from mail or from cargo container shipments from China. But jury is still out, since we don’t have new direct experiments. But let’s see other coronavirus:
2) That said, there is not much experimental research yet on the new #coronavirus yet, but older coronavirus study shows majority inactivation: Survival at 20°C and (a) 20% relative humidity(RH), (b) 50% RH, and (c) 80% RH. -1 log10 is -10x, so -2log10 is -100x. 
3) Again, the above study is not from the #coronavirus from Wuhan. So you most likely cannot get it from mail, but a teeny tiny amount of other coronaviruses can survive dependent on humidity. Don’t panic please.
ncbi.nlm.nih.gov/pmc/articles/P…
ncbi.nlm.nih.gov/pmc/articles/P…
4) the only rare exception case seems to be at the extreme of low temperatures + combined with low humidity. Here is the graph of 2 unrelated coronaviruses at 4°C and (a) 20% RH, (b) 50% RH, and (c) 80% RH. Again these are NOT the same as the new coronavirus.
5) another caveat is that the viruses tested, “TGEV and MHV may be more resistant to inactivation on surfaces than previously studied human coronaviruses.” authors also add that “SARS-CoV has been reported to survive for 36 h on stainless steel (WHO).” So don’t assume = new🦠.
