Dying of measles we would be an effective darwin test. Only the most stupid refuse to get tested, usually in uneducated remote areas, not trusting the press (good), the government (good), but also not their teachers and doctors.
In the famous Coburg outbreak 2001 it was an anthroposophic school (Waldorf), infection rate 1000 of 200.000, no one died. In all subsequent outbreaks it was always such a school. The virus is transported from Waldorf School to Waldorf School with an average vaccination rate of only 60% compared to 90% elsewhere. Hence it could not jump over to the neighboring districts. Why these schools are not yet forbidden is interesting. But you can safely call it a Waldorf illness.