Re:Rare brain-eating amoebas killed woman who rinsed her sin...
by User23 on Saturday December 15, 2018 @04:51AM
(#18687799)
This phenomenon has been well known for almost all of history.
https://en.wikipedia.org/wiki/Mithridatism https://www.ncbi.nlm.nih.gov/books/NBK349158/
Perhaps we're not overthinking it. Maybe there are complex processes that we don't yet understand.