In 1949, polio killed almost 2,500 children nationwide

Health secretary has long been a critic of established medical and scientific experts

New school year and seasonal viruses spur health officials to action

Interview with Dr. Corey Basch of William Paterson University

Limited exemptions may be granted for medical conditions or religious beliefs

Center for Countering Digital Hate says 12 high-profile anti-vaccine influencers produce 65% of viral disinformation