Yes, it is true that certain vaccines can lead to fever-related seizures in young children, but according to researchers, the likelihood of seizures being induced is so low that pediatricians might see one case every five to 10 years. This news offers a bit of relief for parents of small children, but suggests that even when babies and toddlers get three vaccines at once, fever-related seizures are developed at a rate of 30 per 100,000 children.