Vaccine Safety

Although vaccines can have some risks and  mild or even moderate side effects and very rarely cause more severe reactions, vaccines are safe and necessary to keep your kids protected against vaccine-preventable diseases.

Vaccine Safety

Vaccines go through a long process of development and testing to make sure they are safe before they are approved.

“Vaccine development is a long, complex process, often lasting 10-15 years and involving a combination of public and private involvement.”

The History of Vaccines on Vaccine Development, Testing, and Regulation

But it doesn’t stop then.

We continue to see testing and monitoring for vaccine safety:

  • by monitoring the potency of vaccines after they are manufactured
  • by monitoring the temperatures of the vaccines while they are being shipped and stored
  • continuing to do quality testing, even after the vaccine is released
  • using phase 4 trials and with our post-licensure vaccine safety systems, including VAERS, the Vaccine Safety Datalink, and the Clinical Immunization Safety Assessment (CISA) Project

All of this testing and monitoring has led to some vaccine recalls and the withdrawal of the original rotavirus vaccine because of its association with intussusception.

What to Know About Vaccine Safety

Vaccines are well tested and monitored for safety, both before they are approved and after.

More on Vaccine Safety

Updated October 21, 2017

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