1 - Anyone take claims vaccines are 100% safe and effective is a liar. No one that knows anything about vaccines would make such a stupid claim.
Of course. But it's strange how many people catch diseases, even though they are vaccinated against them. Makes me wonder how effective the vaccines are.
It's all about herd immunity. Effectiveness of vaccines depend on this. As we don't have 100% of the population that can be vaccinated getting their shots in school years PLUS the adult boosters later on (one shot as a kid only last for x amount of time depending on which vaccine it is), the risk of diseases coming back into the community increases and then people do get sick. But being vaccine protected means you are extremely unlikely for you to get fatally sick.
We can't forget this diseases are very capable of killing anyone. The flu can kill. Whooping cough is not just a bad cough. Newborns, immunocompromised, cancer suffers - these groups of people in our society rely on the herd immunity we create to not get sick.
More people vaccinated, the less chance of anyone getting sick and if they do, the risk of suffering is reduced as those diseases won't be capable of hitting as hard as they are capable of with some line of defense.
Here's a short blog post with some external links with further information on herd immunity:
http://www.davethehappysinger.com/blog/2011/10/22/what-is-herd-immunity/
2 - Vaccines DO NOT CAUSE autism. The once Dr, Mr Wakefield, has be barred from practicing medicine and his research on this topic removed due to the discovery of a number of fraudulent and unethical practices in the process and obtaining of the results that claimed to prove this myth.
I had thought this may be a myth, but it is a fact that autism has increased dramatically. Something is causing it.
All evidence we have, have smashed the claim that vaccines are linked to the development of autism. Unfortunately, it is appears to be on the rise (some theories point to this rise just being to do with the fact that we are more open to diagnosing young children rather than ignore the problem) and we don't have an answer yet. Blocking science doing what it does best, finding evidence and testing it, delays us finding the answer. It's a waste of time chasing around the vaccine is to blame myth when there is YEARS of solid studies here that debunk it.
I'll bring some links for you to have a read another day, as I need sleep.

Okay. I should be going to bed too. >.>
Have a good sleep!

I think some of these links came up in that blog post above but here are a few sites:
http://www.chainofprotection.org
http://www.ncirs.edu.au
http://www.antivaxxers.com
http://reasonablehank.com
http://www.stopmeryldorey.com
Edit - forgot the direct link to this which you'll see on some of the above URLs:
http://www.hccc.nsw.gov.au/Publications/Media-Releases/PUBLIC-WARNING-/default.aspx