CHONGQING, CHINA - FEBRUARY 16: (CHINA OUT) A worker displays a bald mouse at an animal laboratory of a medical school on February 16, 2008 in Chongqing Municipality, China. A worker holds a bald mouse, used in cancer research, that suffers from a defect in cell-mediated immunity and is highly susceptible to infections. Over 100,000 rats and mice are used in experiments every year for pharmaceutical research in the lab, where the temperature is kept at 24 degrees centigrade. (Photo by China Photos/Getty Images)
