Most viruses can last 24 hours or more on a hard surface.
On clothing was something like 2 to 3 hours.
A tissue paper (Kleenix) was 15 minutes.
On skin it only lasts 5 minutes until our enzymes break it down. (So keep your hands away from your face!)
I would guess that on a piece of paper mail would be similar to clothing - maybe a bit longer?
Freezing doesn’t do anything to a virus. Disinfectant, bleach, etc.
This is a hard outer shell virus. It lasts much longer on surfaces.
Correct, but, “staying alive” and “staying infectious” are two different things. The latter usually “goes” well before the former.
Of note, cold temperatures extend both the above. The figures stated are @ room temp.