March 24 was World Tuberculosis Day, so Worldfocus decided to take a deeper look at a disease that has long been a deadly threat. Tonight's Worldfocus special edition includes a piece by Debra Daugherty about how one South African community has combated the disease. Read more about this public health campaign in Cape Town.

Worldfocus editorial consultant Peter Eisner writes how survivors of the Haitian earthquake need quick solutions that may not come in time for the punishing rainy season that starts in May. Eisner says that Haitians now face the looming threat of disease, misery in makeshift tent camps and a lack of adequate food and water.

According to the World Health Organization, the H1N1 virus has peaked in much of the northern hemisphere, with substantial declines in the U.S. and Canada. While the disease is still active in the U.S., increases are occurring in central and eastern Europe, and in parts of west, central and south Asia. For more, Daljit Dhaliwal interviews Martin Blaser.

Producer Gary Strieker reports from Ethiopia's Amhara region where 60 percent of children suffer from Trachoma, a bacterial eye infection that is the world's leading preventable cause of blindness. A new study finds that antibiotics administered for Trachoma is actually treating other ailments and reducing Ethiopia's high rates of child mortality.

Doc to Dock collects surplus medical supplies - such as hospital beds from a facility that is upgrading - and ships them to Africa. Dalijit Dhaliwal spoke last week with Doc to Dock's founder, Dr. Bruce Charash.