Contrary to current U.S. strategy, vaccinating school children and their parents against the flu is the best way to protect the nation from influenza, including the new pandemic swine flu, U.S. researchers said on Thursday. They added that vaccine priority should be given to people most likely to spread the virus, not those most at risk of serious complications from it. Seasonal and H1N1 vaccination guidelines from the U.S. Centers for Disease Control and Prevention currently target people who are likely to become the most ill if infected.