Blogs aren't concrete facts: MO

• written by concerned parents, not based on scientific fact
• Facebook pages made by anti-vaccination parents are mistaken for credible sources
• believing word-of-mouth over actual facts

http://www.healingourchildren.org/

http://www.voicesforvaccines.org/blog/

http://www.voicesforvaccines.org/leaving-the-anti-vaccine-movement/