from the article:
Certainly, that is the tactic of choice at the prestigious, exclusive Hayground School in Bridgehampton, where an astonishing one-third of typically secular, sophisticated, ultra-liberal parents have, it seems, a “genuine” religious objection to vaccination of their children.

To parents who send their kids to local public schools that doesn’t cut it. A long-established local pediatrician, Gail Schonfeld, now refuses to accept patients the children of parents who won’t permit immunization. She believes in vaccines—in fact, considers them just plain good medical practice—and says if “parents don’t trust me with this, we won’t have a good working relationship.”