A student receives 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 frist phase of the three-stage initiative started at 125 schools with enrollment of less than 400. [Xinhua]

A student receives 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]