• Following the recommended immunization schedule offers the best protection from vaccine-preventable diseases.
• The vaccine schedule is based on the best scientific information available.
• There is no science behind alternative immunization schedules. Delaying or withholding vaccines only increases the amount of time that an individual is vulnerable to diseases.

All vaccines used in the U.S. are required to go through years of extensive safety testing before they are licensed by the U.S. food and Drug Administration. Three systems are used to carefully monitor the safety of vaccines after they are licensed. One of the three systems is called the Vaccine Adverse Event Reporting System (VAERS)​ and it accepts reports from healthcare professionals, vaccine manufacturers, and the general public.

• About 85 to 90 percent of the adverse events that occur after vaccination are mild and may include fever, vaccination side redness or swelling, and mild irritability.
• A recent study of VAERS data shows that less than 3% of adverse reaction reports from vaccines are actually found to be related to the vaccine.
• Vaccine Safety
• Vaccine Ingredients
• Institute for Vaccine Safety

Immunization Schedules