It was frustrating trying to discuss this issue with Sam. It was like talking to a slippery wall. But people should be warned that anti-vax nonsense is dangerous. Here's two more.
Non-Vaccinators Don’t Care If Other People Die
https://www.thecut.com/2016/03/vaccine-refusal-measles-pertussis.html
7 Biggest Lies Spread by the Anti-Vaccine Movement
https://mic.com/articles/85725/7-biggest-lies-spread-by-the-anti-vaccine-movement-debunked-by-science#.IuR3d26JQ