A student prepares to receive a free H1N1 flu vaccine at the 157 Public Elementary School in New York, the United States, October 28, 2009. New York City began its school-based H1N1 influenza vaccination campaign on Wednesday. The first phase of the three-stage initiative started at 125 schools with enrollment of less than 400. [Xinhua]

Two doses of H1N1 flu vaccine are placed on the desk at the 157 Public Elementary School, where students can receive the vaccin, in New York, the United States, October 28, 2009. New York City began its school-based H1N1 influenza vaccination campaign on Wednesday. The frist phase of the three-stage initiative started at 125 schools with enrollment of less than 400. [Xinhua]