A hygiene staffer sprays disinfectants at a temporary resettlement during a comprehensive anti-epidemics operation in Guixi Village, Beichuan County, southwest China's Sichuan Province, May 20, 2008. Beginning on Monday, the Ministry of Health has dispatched 500 more health and epidemic prevention workers each day for five days to the quake-ridden areas, and 1,000 health supervisors would be deployed by May 23, and no major outbreak of epidemic diseases or other public health threats had been reported in the quake-stricken areas as of 9:00 PM Monday.

Hygiene staff spray disinfectants at a temporary resettlement during a comprehensive anti-epidemics operation in Guixi Village, Beichuan County, southwest China's Sichuan Province, May 20, 2008.

Military hygiene staffers spray disinfectants to a passing car en route during a comprehensive anti-epidemics operation in Hongbai Township, Shifang City, southwest China's Sichuan Province, May 20, 2008.

A military hygiene staffer sprays disinfectants to students' book-bags grabed from crumbled debris, during a comprehensive anti-epidemics operation, at Hongbai Township, Shifang City, southwest China's Sichuan Province, May 20, 2008.

Hygiene staff sort in empty bottles of disinfectants and antisepsis agents in substantial and widespread application during a comprehensive anti-epidemics operation at Hongbai Township, Shifang City, southwest China's Sichuan Province, May 20, 2008.

(Xinhua News Agency May 21, 2008)