so this website was linked on the jezebel most popular in the comments, its an anti vaccine website, and look, they are REFERENCING THEIR OWN WEBSITE, you can't do that, that's like "saying according to me, the world is flat, I said that 2 years ago, therefore it is" and if you go to the first link here is what it says at the beginning of page 2.

this is the American Academy of Pediatrics, probably fairly reliable

And on their last reference that is the World Health Organization (which will be a reliable source), here is what is says also on the beginning of the first page.

if you are going to reference something, make sure it doesn't go totally against what you are trying to proclaim.