Pathologist here, I use FDA-approved antibodies in my daily practice. I'm going to assume you're a hacker and you're looking for what I'll call "Haynes Manual" understanding. Any textbook on molecular biology or immunology would be a good start. Conversely, I would strongly advise avoiding anything from any internet personality with an opinion on this stuff.

The medical part of the internet is extremely skewed because the subject matter is rather complicated. There are experts trying desperately to stay in their lanes and keep up high walls by only publishing in serious scientific journals, and there's the YouTubers and bloggers inviting you into their pits of crazy. Even if you're trying to understand a fairly simple system, like a modern drive-by-wire Honda Accord, YouTube is likely to lead you astray before you find the right answer. When it comes to biomedical systems, most social media types are telling you to pour sugar in your gas tank, and the right answer has never, and may never, be posted in that forum.

The compromise is to read a textbook. Sort of like a Haynes manual isn't actually going to teach you the finer points of adiabatic expansion, but you can get reliable information about how your car is put together.