The reason we're concerned about mail and packages is that during the Spanish Flu epidemic there were several Alaskan communities that were infected by their only outside contact, which was the mail. Supposedly, the mail carriers did not enter the communities. This was discussed in Dr. Hatfill's book "Three Seconds to Midnight".
We also open our mail outside. Junk mail and empty boxes are going to be burned outdoors. We haven't had much sunlight lately, using the UV from the sun was my original plan. We do have a small UV wand; I need to research how long the parcels would need UV exposure to be decontaminated. But with UV, there are many variables, i.e., like length of exposure, the wattage of the UV bulb, the texture of the contaminated surface, and how close the light needs to be to the surface. I have some magazines that need decontaminated, and spraying with a liquid would ruin them. I'm also concerned about putting them in the oven, because the color inks may have a problem with the intense heat. So, UV may be the only solution.
Stay safe everyone. A small mistake could ultimately be fatal.