Another thing worth mentioning:
I have just put the post and the newspaper in the oven for 30 minutes. Apparently Coronaviruses are rendered non-infectious by 30 minutes at 75C, so I am giving it 30 minutes at 90C to be safe.
Provided you don't have a gas oven and you keep your post/newspaper well away from any heating element, this might seem like an easy and worthwhile precaution. 75C isn't going to set fire to anything.
The survival abilities on the surfaces of eight different materials and in water were quite comparable, revealing reduction of infectivity after 72 to 96 h exposure. Viruses stayed stable at 4 degrees C, at room temperature (20 degrees C) and at 37 degrees C for at least 2 h without remarkable change in the infectious ability in cells, but were converted to be non-infectious after 90-, 60- and 30-min exposure at 56 degrees C, at 67 degrees C and at 75 degrees C, respectively.
https://europepmc.org/article/med/14631830