There are a lot of toxins and stuff that can get on parcels during shipping. Especially if it crossed the border as they do sometimes spray to stop organic contaminants. There's also dust and crap from the engines that can get on the parcels. This varies from port to port, crossing to crossing, and method of shipping.
Interesting that the language of that sounds British was found to have "taken ill". I know the UK is having one heck of a time with things lately, so it could be.
Canada Post says they spray the sorting stations if there is an outbreak. I imagine that includes any parcels in that station. But it's not a regular thing (too expensive).
The
local (to me) health recommendation when handling parcels is to put the packaging in the recycling and to wash the hands for at least 20 seconds with
soap and warm
water after unpacking. But this is not new to 2020.
So... possible. But probably not every parcel.