Interesting story about scientists who develop allergies to their subject of research through repeated exposure. Studying ragweed pollen and developing hay fever is one thing. Developing anaphylaxis to snake venom – even venom that’s normally harmless to humans – is another.
I think my favorite was the butterfly researcher who developed severe asthma when exposed to sulphur butterflies, so he switched to killer bees.
https://www.atlasobscura.com/articles/scientist-allergies-research