Medical personnels from the Third Military Medical University prepare to spray disinfector to prevent epidemic in a primary school in Lixian County, southwest China's Sichuan Province, on May 17, 2008. Soldiers of People's Liberation Army (PLA) rushed into quake-hit areas and conducted their rescue operation efficiently after the earthquake happened on Monday.

A medical personnel of the national earthquake emergency relief team sprays disinfector on trucks at their station in Beichuan County, southwest China's Sichuan Province, on May 17, 2008.

Medical personnels spray disinfector on rescuers who just comes back from the quake-hit area at their station in Beichuan County, southwest China's Sichuan Province, on May 17, 2008.

A medical personnel of the national earthquake emergency relief team sprays disinfector on a search dog at their station in Beichuan County, southwest China's Sichuan Province, on May 17, 2008.

A medical personnel of the national earthquake emergency relief team sprays disinfector on a vehicle at their station in Beichuan County, southwest China's Sichuan Province, on May 17, 2008.

(Xinhua News Agency May 19, 2008)