The Hidden Invaders

Parasitic Worm Problem (2:18); Fact of Life in Brazil (3:09); Parasitic Worm Process (1:59); Testing for Parasites (5:11); Modern Medicine (8:04); Constant Threat for Children (2:24); Intervention for Hookworms (5:06); Isolated Farm Research (4:20); Drug Resistance (2:41); Test Results (5:40); Students Improve (2:51);