It’s a third world thing. Avoid becoming run down, exhausted.
Tuberculosis used to be quite widespread in Europe. In the past it was called "consumption" for want of a real understanding of the cause of the disease. It was also prevalent in America in the 17th through early and mid twentieth century. I remember getting tested in grade school (skin test) and when I joined the Air Force for tuberculosis.
America and Europe brought tuberculosis under control and virtually eliminated it by the use of new antibiotics and quarantining the infected in places called "sanitoriums." Confinement was usually involuntary until the infected person was noncontagious.