evidence: Vaccines prevent six million deaths worldwide every year, CNN’s Dr. Sanjay Gupta writes. And there’s basically no reason not to get them. Only one in a million children has a serious adverse reaction. Those are great odds. You’re 100 times more likely to get struck by lightning than have an allergic reaction to a vaccine, Gupta says. Taking aspirin, for example, is much more likely to cause bleeding in brain. [...] Vaccine Adverse Event Reporting System (VAERS) in the U.S.: [...] VAERS data are monitored to– •Detect new, unusual, or rare vaccine adverse events •Monitor increases in known adverse events •Identify potential patient risk factors for particular types of adverse events •Identify vaccine lots with increased numbers or types of reported adverse events •Assess the safety of newly licensed vaccines