While there have been many non-life threatening, yet unsavory aspects to the Occupy Mobs across the country, such as pubic lice, sexual assault, and rampant drug use, there is now the threat of tuberculosis, which can be contracted merely by breathing in the contaminated air:
"The Fulton County Health Department confirmed that both Occupy Atlanta protesters and the homeless people in the shelter may still be at risk since tuberculosis is contracted through air contact." -- Source