Thanks, David!

And thanks for the input on microbes. However, there does seem to be some wigggle room there...Just as a point of clarification, acording to the 'microbiology society' (of which I am not a member):

"Viruses are the smallest of all the microbes."

https://microbiologysociety.org/why-microbiology-matters/what-is-microbiology/viruses.html

In any case, this whole area of discussion is way above my pay grade...

Best,
James