Possums do not build their own dens, instead they will move into a home that a previous animal has dug/built. They will also find holes near foundations, or crawl spaces inviting.
Possum carry diseases such as leptospirosis, tuberculosis, relapsing fever, tularemia, spotted fever, toxoplasmosis, coccidiosis, trichomoniasis, and Chagas disease.
They can also host parasites like fleas, ticks, mites, and lice.
Possum are also hosts for cat and dog fleas, especially in urban environments.”
possum prints possum droppings