Anthropology

use it as a bioweapon on blankets given to the Native Americans. That cowpox confers some immunity to smallpox is not relevant as these were plains Indians--not those who would have had much or perhaps any exposure to domestic cattle, much less milk cows.

And I have more than three decades of both clinical and research experience in infectious disease epidemiology so you should realize that. That includes several years specializing in arboviral and other zoonotic infections. I certainly am not conflating the natural spread of mosquito, tick, flea, lice or other arthropod or vector-borne diseases with direct human transmission.