I have a few deliveries of cat food/litter coming and since the coronavirus can live for ~5 days on a surface, it might not be a bad idea to just move those to the garage for a few days just in case the packers/deliverers have something.
Just a thought.
Someone's already done the tests on the virus longevity. I can't find the link now (maybe it was on the coronavirus sub here), but longevity is 100+ days. Under most conditions, it's going to be much much longer.
About the best you can do is buy American now and make sure you don't need much more until this blows over.