Most history books emphasized how large numbers of native Americans died from European diseases but often didn't mention if the Europeans suffered from American diseases.
Regarding "New World" diseases: When Europeans brought diseases to the new world, how come Europeans themselves didn't get sick from diseases specific to the new world? written by u/anthropology_nerd
Regarding the extent of Old World diseases in the New World: Disease in 'The New World' with answers by u/Reedstilt and u/anthropology_nerd