Thera are accounts of Europeans coming in contact with the Americas causing pandemics in the local population because they had no immunity to viruses they never had encountered. Is there any evidence of the opposite? Where Europeans contracted something from the natives.
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
Not exactly what you asked, but 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