Parents are encouraged to talk to their trusted health care provider if they have questions or concerns about vaccination. Vaccines are very safe. Most reactions are minor and treatable. There are so few deaths that could plausibly be connected to vaccine and the risk is so small that it is hard to assess statistically. In that case we call it a theoretical risk.
Vaccines are as safe today as modern science can achieve.
We continually work on trying to identify any possible long-term effects and to make vaccines safer. The fact is that children are much more likely to be harmed by the disease than by the vaccine designed to prevent the disease. All controlled studies that have compared immunized versus non-immunized children have found either NO relationship or a decreased risk of SIDS among immunized children. Parents concerned about SIDS should be made aware of the Back to Sleep campaign - encourage parents to put their babies on their backs to sleep. The issues of multiple vaccinations have been studied and the WHO will not recommend multiple vaccinations unless studies show the combinations to be both safe and effective. .