Mexico is telling citizens to stay home, urging businesses to close for five days and suspending government services as the World Health Organization warns the swine flu outbreak is on the brink of becoming a global epidemic, according to AP. In the United States, federal health officials said Thursday the number of confirmed cases had risen to 109. President Barack Obama told Americans the government was «taking the utmost precautions and preparations» to stop the virus. Mexican President Felipe Calderon said in a televised address that only essential businesses such as supermarkets, hospitals and pharmacies should stay open, and only critical government workers such as police and soldiers would be on duty from Friday through Tuesday. School had already been canceled nationwide through Tuesday. The steps are aimed at stopping further spread of the virus, blamed for 168 deaths in Mexico and one in the United States, even though the WHO has suggested nations should focus on minimizing its effects, not containing its spread. «There is no safer place to protect yourself against catching swine flu than in your house,» Calderon said Wednesday night in a televised address. He defended the government against criticism that it had been slow to act against signs of a new and dangerous virus.