Originally posted by Jimmyhair
Short answer is you can’t because there is no correlation between the two.
Secondly, little is truly known about autism, but what we do know is that there is a positive correlation between age of the mother and the likely hood of her conceiving an autistic baby. Meaning the older the mother the greater the chance of her child being born with autism. It is thought that this is a result of a mother's finite eggs degrading over time due to factors of oxidation and free radicals. When the eggs do break down the cells try to repair them and this is where mutations can occur during DNA translation and RNA transcription. To my knowledge they have not currently identified any mutations related to Autism but they very well could have, as I haven't read up on it much lately.
Anyways, all of the above goes to show you why autism is high in the western world and lower in previous centuries. Previously women conceived at a very young age which would significantly lower their chances of having an autistic baby. Women today generally have children much later in the life, thus increasing the chances of autism in their offspring. I don't know there probably are some environmental factors that affect autism, but to say it is not genetics at all and it is solely because of immunizations is a false and reckless statement rooted in baseless science
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