When it comes to the importance of vaccines, we know many celebrities have a lot more to learn about these much-needed safeguards against disease and should get the facts before speaking out against them.

Jenny McCarthy

Perhaps the most well-known anti-vaccine advocate, television personality Jenny McCarthy has since sought to distance herself from support of the movement.

Alicia Silverstone

The Clueless star spoke out against vaccines in her 2014 book The Kind Mama: A Simple Guide to Supercharged Fertility, a Radiant Pregnancy, a Sweeter Birth, and a Healthier, More Beautiful Beginning.

Rob Schneider

Actor and comedian Rob Schneider has long been an outspoken opponent of vaccines—and has even accused the CDC of fraudulent activity in promoting vaccines to African-American children.

Kristin Cavallari

Kristin “I-thought-we’d-be-talking-about-fashion!” Cavallari sure has come a long way from her days on Laguna Beach and The Hills – but the reality star needs a reality check when it comes to her misguided views on vaccines.

Donald Trump

Apparently not content with being one of the wealthiest men in the world, The Donald regularly courts the spotlight with his conspiracy theories, including his rants that “the doctors lied” about vaccinations.

Holly Robinson Peete

The actress jumped onto the anti-vaccine bandwagon in her 2009 Essence.com letter saying that vaccines caused autism in her then-2-year-old son; she later said that she believes “it is every parent’s right and responsibility to make vaccine and treatment decisions for themselves.”