www.cdc.gov/vaccines/vac-gen/safety/default.htm
Patients or parents of patients with vaccination concerns should be directed to the Centers for Disease Control and Prevention’s (CDC) National Immunization Program website. Visitors to the site are provided with detailed information about the safety of vaccines, possible vaccine side-effects, and vaccine research. The site also provides essential information for immunization providers, such as how to communicate the risks and benefits of vaccines to patients and the timing and spacing of vaccine doses.