OK...I should have limited my question to insects and botanicals.
‘Insects and botanicals’....
and I would add viruses.
(On the other hand, if we hadn’t been exposed to so many things in the past, from people coming here with all kinds of disease that we probably couldn’t even recognize when we WERE screening immigrants - we wouldn’t know about them, wouldn’t have adapted a certain immunity to many of them, or learned to cope with others of them through vaccines and therapies.)
Life and Nature are always a crapshoot - and crap happens.
But Americans have never failed to learn and progress through adversity - and we’ll get through all of this, too.