HEALTH -- March 24, 2011 at 11:26 AM ET
Slide Show: Tuberculosis a Silent Killer
Health officials are drawing attention to the 22 countries that contribute 80 percent of the global burden of tuberculosis on March 24, designated World TB Day.
Tuberculosis is a deadly infectious disease that can be transmitted through the air, making it particularly contagious in crowded cities and between family members. Read a post from Ray Suarez on the TB epidemic in South Africa and learn more about the experience of TB patients in India, Afghanistan and Brazil in the slide show below.