I appreciate everyone gets concerned about vaccine side effects but I'm wondering how often people have experienced uncommon side effects? We're on day 6/7 following the MMR vaccine and my 13 month old has been experiencing a raging fever and vomiting and diarrhoea. He had a random bout of vomiting about 4 days post vaccine which I assumed may be a stomach bug but he seemed to have recovered fairly quickly and had no fever. This one seems different and given the timing, I suspect is linked to the vaccine. Just wondering if anyone experienced similar and could reassure me there's some end in sight soon?