Cockroaches carry 33 different species of bacteria, including E. coli and Salmonella. Mice deposit up to 70 droppings per day in your cabinets, across your countertops, on surfaces you touch and eat from. They contaminate food packaging just by walking across it.
Rodent urine, invisible to the naked eye, dries on surfaces and becomes airborne particulate.
Every morning you wake up in an infested home, you've already been exposed.