Plenty of people don't inoculate their children with vaccinations. I personally think they are fools (in this matter), but I don't think they are criminals.
A woman in Mea Shearim has come under fire for not inoculating her children. Somehow they also connected this to the fact that she is a member of the "kat haShalim" - the veiled women cult, as if that has any relevance. If it does have relevance, I am not aware of it. Plenty of people do not believe in the efficacy of inoculations without having any connection to the kat hashalim.
Plenty of people don't inoculate their kids, but what makes this case special is that in this case one of the sick children died of his flu. A neighbor realized something was wrong, seeing the baby listless, and it seems many in the family were ill at the same time, and called the paramedics.
(source: NRG)
According to Kikar, the case has gone to one where the security forces have now raided her house in Mea Shearim last night, only to find that the kids had been moved to an unknown location. It seems they decided on the operation after being told by neighbors that there is another sick child in the family that is not being taken care of.
Personally I think that the inoculation issue isn't the main issue. If a person thinks inoculations cause more harm than good, than they can go to doctors, they can go the alternative medicine path, the homeopathy, or use whatever methods such people use to keep their kids healthy. I think the bigger issue here is that the mother did not take her deathly ill kid to a doctor, she did not call the paramedics when it became necessary, and she could not even be found when the paramedics came to revive the child.
The fact that a person does not believe in the method of inoculations as being good care for their kids does not mean they are necessarily neglecting their children. If they are not inoculating their kids, they should be vigilant in using the alternative methods of maintaining the health of their children and preventing the major illnesses. If they do not use inoculations but also don't do anything else, that is neglect - perhaps abusive neglect, perhaps criminal neglect - and the fates of these children should not be left in the hands of such a person.
According to Bechadrei, the rabbonim of the Eida are also looking for them and have called for the kids to be removed from her care.