A disease like tuberculosis is considered a social disease. Tuberculosis still exists in Canada because indigenous populations live in appalling conditions. Up north, several families live together in the same house. Of course, the situation is ripe for the spread of tuberculosis. I live in Montreal, and that isn't an issue.
It is indeed a social disease. We need to focus more on that and address all of the factors involved. We can't overlook those who will become ill regardless, though. We can't focus exclusively on the recommendations of public health authorities. We need to pay more attention to the medical dimension and access to drugs because, even with ideal housing and the best living conditions, people will always get sick.
For example, I don't think Ms. Kyle takes insulin because of poor eating habits.