When it comes to vaccines, spreading truth, facts, and evidence are urgent public health priorities -- and so is confronting the anti-vaccine movement.

This week, Chelsea sits down with Heather Simpson, a mom and former anti-vax influencer-turned vaccine advocate. She also talks with vaccine researcher, advocate and Co-Director of the Center for Vaccine Development at Texas Children’s Hospital and Dean of the National School of Tropical Medicine at Baylor College of Medicine, Dr. Peter Hotez, about how we can fight the powerful tide of disinformation, overcome distrust, and help get more people the facts they need to make the right health decisions for themselves and their families.