Are Vaccines Safe?

Vaccine Safety: Are Vaccines Safe?


The first definition of the word safe is “harmless.” This definition would imply that any negative consequence of a vaccine would make the vaccine unsafe. Using this definition, no vaccine is 100 percent safe. Almost all vaccines can cause pain, redness or tenderness at the site of injection. Read more from the Children’s Hospital of Philadelphia.



Each of us is our own best health advocate. Many times, our loved ones depend on us for information and protection too. With so much information – and sometimes incorrect information – available today, learning the facts before making health decisions is very important. These pages will help answer common questions about vaccine safety. Learn more about specific vaccines here.