Except high fructose corn syrup is in almost everything we eat, vaccines happen a few times in your life.
It's easy to find rare occureances on the internet - people who have experiences them can group together. Doesn't mean they are any less rare though.... People do study these reactions and determine many of them are coincidences yes.
What physical mechanism causes a person to develop diabetes following an immunization which would differ from if there immune system were naturally exposed to toxins? That's the pertinent point here I think.
There are physical mechanisms which link eating too much sugary, processed food (including HCFS) to the development of diabetes....
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