YES!!!!!! THANK YOU!!!!
Vaccines do not cause autism. Period.
Autism is NOWHERE NEAR even comparable to the horrible diseases these vaccines prevent. If your biggest reason for being "anti-vax" is because they "might cause autism", you have some serious thinking to do about your priorities.
No, vaccines are not 100% effective in 100% of people. Yes,you can still catch the diseases the vaccines prevent, and that friend-of-a-friend may have contracted chicken pox, despite being vaccinated. I promise their bout of illness was significantly lessened because they were vaccinated.
There are people who can't be vaccinated, for a number of reasons (like close friends of ours, whose little guy needed a stem cell transplant, and so lost all the immunity he had built up, and needed to wait until he could safely be re-vaccinated), who rely on herd immunity to keep them safe. Herd immunity doesn't work if the herd isn't immunized.