Chinese authorities are racing to prevent diseases breaking out among 5 million people left homeless in the wake of the massive earthquake that killed almost 70,000. Workers in protective suits circled collapsed communities in trucks on Monday, spraying disinfectant on the rubble. Providing safe food, drinking water and temporary shelters was a priority following the May 12 earthquake, the Health Ministry said. Bodies discovered in the rubble were being disinfected, ministry spokesman Mao Qun'an said in an interview posted on the central government's Web site. "If we can do those four things properly, we have the confidence to guarantee there will be no epidemics after the disaster," Mao said. He said there was no evidence of contagious diseases in the quake zone, where survivors were crammed into tents and other temporary shelters.