Doctors are warning parents against reviving “measles parties” intended to expose children to the disease at a gathering with at least one infected person. The parties ostensibly help children build immunity against the disease and are used instead of vaccinating or leaving exposure up to chance. Such practices have been discouraged despite similar events such as “pox parties” which expose children to chickenpox for the purpose of building immunity. “CDPH strongly recommends against the intentional exposure of children to measles as it unnecessarily places the exposed children at potentially grave risk and could contribute to further spread of the outbreak,”...