The escalating standoff between the CDC and Pennsylvania over measles deaths NBC NewsShapiro fires back at RFK Jr., Trump on measles: ‘Incompetence’ The HillPennsylvania reports fourth measles-related death, the most in US in decades CNNPennsylvania asks CDC for emergency help as measles outbreak spreads The GuardianGov. Josh Shapiro calls on CDC to recognize measles-associated deaths in Pa. outbreak WPSU