Intense tracking for swine flu shot's side effects

The government is starting a system to track possible side effects as mass flu vaccinations begin, with a goal to detect any problems quickly. On top of routine vaccine tracking, there are several government-sponsored projects that include efforts by Harvard Medical School scientists and Johns Hopkins University. The Centers for Disease Control and Prevention, for example, is preparing take-home cards that tell vaccine recipients how to report any suspected side effects to the nation's Vaccine Adverse Event Reporting system.