Doctors in Pennsylvania have identified at least six babies born already infected with measles during the state's outbreak, and two were sick enough to need intensive care, NBC News reported last week. The Pennsylvania Department of Health's public statewide updates have not listed a separate count of these infections, so the figure reflects physicians' reports rather than a confirmed state tally.
The condition, called congenital measles, occurs when a mother infected late in pregnancy passes the virus to her baby before or during birth. It has rarely been seen in the U.S., and many doctors are treating it for the first time.