Vaccine Safety Research

The United States’ long-standing vaccine safety system ensures vaccines are as safe as possible. As science advances and new information becomes available, this system will continue to improve.

Vaccine safety research:

• Ensures the benefits of vaccines approved in the U.S. outweigh the risks.
• Defines which groups should not certain vaccines.
• Describes side effects and adverse events reported after vaccination.
• Evaluates whether reported side effects and adverse events can be directly linked to a vaccine.