I've just read a very good (and very readable) book on the subject. It came out just before the coronavirus pandemic, so doesn't mention it, but it explains a lot of the history and the science of the spread of all sorts of things, how both physical and virtual viruses, and memes of other kinds move through populations, from folk stories and financial crises to gun violence and misinformation. Some background tales about researchers and research into the subject, too.
"The rules of contagion - why things spread, and why they stop." by Adam Kucharsky. (The Kindle version only cost me £4.27)