@Eris You dont. But you do need to understand a topic if you expect to state facts about said topic.
@Eris Thanks for proving my point, that people too stupid to pass the above test will also be too stupid to assert actual facts correctly.
@Eris I've addressed this topic in detail dozens of times on my time line. Every time the anti-vax morons just spew nonsense and ignore or arent smart enough to comprehend the reality. So yes at this point I stopped putting int he effort because its a waste of my time.
When did I ever say that. I have been vocal and against the government forcing vaccinations.