Pennsylvania health department alerts on congenital measles cases amid ongoing outbreak
Pennsylvania has reported cases of measles in pregnant women and congenital measles in newborns—a phenomenon unseen in the state for decades—as vaccination rates decline nationwide.
What happened
Pennsylvania's health department issued a health alert Monday regarding an increase in measles cases during pregnancy and resulting congenital measles cases. As of October 19, Pennsylvania reported 1,286 measles cases across 42 counties, with 247 hospitalizations and six reported deaths (one still pending state investigation). Reporting indicated 53 cases of measles during pregnancy, with at least one congenital case resulting in death—a newborn who died immediately after birth while his mother was severely ill. The alert included clinical guidance for managing measles in pregnancy and newborns, reflecting the rarity of such cases among practicing physicians.
Context
Measles vaccination via the MMR vaccine has been highly successful for decades, making congenital measles and severe pregnancy-related cases largely absent from recent medical practice. The current outbreak reflects declining vaccination rates nationwide, allowing the highly infectious virus to establish footholds in under-vaccinated communities. Pregnant people unvaccinated against measles and without prior infection face elevated risks including hospitalization, pneumonia, oxygen/mechanical ventilation needs, death, miscarriage, stillbirth, low birth weight, and preterm labor. The MMR vaccine cannot be administered during pregnancy due to its live attenuated formulation posing theoretical fetal risk; post-exposure prophylaxis via intravenous immunoglobulin is the available protective measure but must be given within six days of exposure.