If you do go out wear rubber gloves and a mask. Never touch your face when out. Thankfully you got a job that allows WFH and you should be able to ride this out.
I am curious if you have a source for the two day number.
I have seen various reports ranging from 12-24 hours for how long this particular virus can last on surfaces like cardboard. The longest estimate I have seen for any surface is 72 hours for stainless steel under lab conditions (i.e. not real-world conditions).
So presumably if it takes 2-3 days for a package to arrive, the contents should be okay if you wait another day or so for the exterior surface to become safe.
Although I'm not an epidemiologist, I suspect that your probability of catching the disease from a package decays roughly exponentially with time.
Personally, and as someone not immunocompromised, I've been setting my packages aside (in my apartment) and washing my hands thoroughly afterwards. In cases where I'm particularly eager to get the contents, I'll open them after a day and not worry too much. Otherwise, I'll let them sit for two or three days.
Not sure why parent is subtracting the transit time: Who delivered the package? Were they infected? Exactly.
> wait another day or so for the exterior surface to become safe.
Unless you think that for some reason the exterior of the box is going to have live virus for more than what’s been reported, this seems reasonable.