I thought this was a fascinating little story...I remember reading several books back in the day and Marat was a fascinating creature
...and now the clever kids have added a bit of info to the story

"Based on all the available evidence, we hypothesize that Marat may have suffered from a primary fungal infection (seborrheic dermatitis), superinfected with bacterial opportunistic pathogens."

https://www.biorxiv.org/content/10.1...jg6X2xsVyg1MI4

...it sounds quite maddening...I have some minor 'old guy skin' issues and they can really drive you bonkers when it acts up so I can just imagine what he was going through...although some 'Karma' talk might also be appropriate if memory serves...

Mike