Parents who come to Pia Habersang’s practice in Amarillo shun vaccinations, with the encouragement of the clinic’s nurse practitioner; the health secretary, Robert F. Kennedy Jr.; and President Trump.
On a warm October day, Victoria Rodriguez tried to soothe her restless daughter as the girl fidgeted on an examining table of a West Texas children’s clinic. Pia Habersang, the nurse practitioner who runs the clinic, leaned closer. “How is her speech... [7229 chars]

