Abandoned Tuberculosis (and Other Disease) Sanatoria
Several former hospitals that, at one time or another, warehoused patients suffering from dread communicable diseases (usually tuberculosis, but others I suppose) are still standing throughout the US. These buildings are attractions for vandals, urban explorers, ghost hunters, etc.
My understanding of microbiology is pretty limited, so please forgive me for asking what may be a really stupid question: are people who visit those places at any risk of contracting disease? Like, the bacteria from patients still linger on surfaces and are still potent, despite decades of being exposed to the elements?