The author’s statement about Tuberculosis is correct in that there are societal factors which affect infection rates and that these factors need to be understood in order to eradicate the disease. Since Tuberculosis is spread through respiratory droplets and spit, ventilation becomes an important factor in infection rate. A higher risk of Tuberculosis infection has been observed throughout history in areas where people live in close contact with poor sanitation and ventilation. Those people who live in such areas have historically been a part of the lower economic classes such as immigrants living in tenements in the 19th century or those who have lived in homeless shelters and jails today. A further complication is a lack of understanding of how the medicine they are taking cures them. Due to unpleasant side-effects and a timeline of six to nine months, some people who begin treatment stop partway through without realizing the damage that they are doing. Tuberculosis that is only partially treated may become resistant to the most effective drugs available (called Multi Drug Resistant TB). This MDR strain of the disease is now being spread from person to person, and is much more difficult to treat (and thus has a higher fatality rate). Even more troubling is the emergence of Extensively Drug Resistant TB which is resistant to the second most effective drugs as well. Medical professionals are trying their best to ensure that treatment is followed by counseling patients and observing them while they take their medications (called Directly Observed Therapy), but these drug resistant strains of Tuberculosis still threaten to undo the progress that has already been made in the fight against this disease. Widespread education about the disease, prevention, and treatment will be needed in the lower economic classes to speed the eradication of Tuberculosis