Four fully vaccinated people test positive for measles, Pennsylvania secretary of health says

Pennsylvania Secretary of Health Dr. Debra Bogen said four fully vaccinated people tested positive for measles, the first such cases identified during the outbreak. Bogen made the announcement during a live update that was streamed Friday afternoon. You can watch the full update in the video player below. The fully vaccinated people who tested positive were three adults and one child from Centre, Jefferson, Lancaster, and Lycoming counties, and none were hospitalized. Bogen said breakthrough cases are rare. Nationwide, about 3% of measles cases this year have been in fully vaccinated people. Even when they do occur, illness is usually...