Much of our agricultural and wildlife
problems and diseases are very
similar to our citizens maladies.
They're brought in from outside from
other countries and continents.
Fire ants and zebra mussels and
tilapia are the first things that come
to mind. Human diseases are things
we've already whipped in the past
like polio, smallpox, TB, etc.
and stuff from stupidly letting anyone
and everybody in , diseases such as
Ebola, covid 19, bird flu, etc.