To add on to sources of fascinating information...

At least for me, I had tons of pedestrian questions, as I haven't taken a biology/chemistry course since high school.

A search for virology on the youtoobs led me here: https://www.youtube.com/watch?v=8_bOhZd6ieM

I found it to be a homerun in all but addressing my 20-30 questions in these times just in the first ten minutes. To the point. Without the current yt culture of gratuitous cuts and FX.