@hyc @TucsonSentinel that's true but immunisation is generally very clustered with communities of close contacts with similar views, so quite large local outbreaks are possible. Not sure if Texas has good reporting, I recall being told that Amazonia had a better idea of the number and location of all its measles cases than the USA. Indeed the USA was the reservoir of measles in the Americas! So it's not a new problem as I've been retired for almost 10 years....!