The outbreak on the east coast was from a large orthodox Jewish community, who as I understand it, rejects vaccinations on religious grounds. Was the person in this case from there or in contact with people from there?
there were NO religious grounds(confirmed by a number of religious leaders). This was mostly due to anti-vaxx propaganda and closedness of the community
So centered in specific religious community that has their own neighborhoods, ambulances and police force and susceptible to outsider propaganda somehow? But not in any way on religious grounds? What's the reasoning? Just because religious leaders outside the community have different opinions doesn't automatically mean 'no religious grounds'. It just means they see things differently.
There’s nothing in Jewish teachings[0] to justify an anti-vaccination stance. However, as an insular community it is particularly susceptible to anti-vaccine misinformation[1].
0. In numerous states parents wishing not to vaccinate their children are permitted to sign a document stating that their religious convictions do not allow them to; based on this signature the child will then be permitted to attend school under the law. It is reported that small numbers of parents in Jewish schools have signed such documents. For a parent of a yeshiva student to sign such a statement in the name of Judaism is not just inappropriate, it is false. Whether a posek will rule that childhood immunizations are obligatory in halakhah or are discretionary (but highly advisable), there is no position in halakhah that says there is any prohibition or compelling reason to refrain from such vaccinations.