12 month vaccine and autism.?

i got twins who just turned one a boy and a girl. they are due for their 12 months vaccine, but some say that this vaccine is somehow related to the reason why some gits are autistic. i'm worried should i give them the vaccine? is it ook to skip it? my older twins also a boy and girl had their 12 months vaccine three yeaars ago and they turned out fine, no signs of autism in either of them. please i need expert answers and advice.