The odds of developing epilepsy are increased in those who have even one seizure. Increase seizures from MMR = increase epilepsy from MMR.
“Furthermore, a large 2004 Danish epidemiological study published in JAMA found that the risk of febrile seizures after MMR vaccination is 1 in 640[4] —
a five-fold higher risk of febrile seizure than the risk of seizure from measles.[5]
www.bmj.com
“Our study revealed that the incidence of subsequent epilepsy after febrile seizures was 10% in individuals that had febrile seizures. This is similar to the results in a prospective cohort study by Neligan et al.
13), which demonstrated that the risk of developing epilepsy following febrile seizures was 2%–10%.”
Febrile seizure, the most common type of pediatric convulsive disorder, is a benign seizure syndrome distinct from epilepsy. However, as epilepsy is also common during childhood, we aimed to identify the prognostic factors that can predict epilepsy ...
pmc.ncbi.nlm.nih.gov
We still don’t know what “causes” epilepsy in healthy kids, but we DO know that even one febrile seizure increases the risk for epilepsy.