Confirmed cases have risen to 1,317, with 251 hospital admissions and transmission now reported in 43 Pennsylvania counties.
Pennsylvania’s measles outbreak has climbed to 1,317 confirmed cases this year, with health officials warning that transmission continues to widen across the state. In its latest update on Wednesday, the Pennsylvania Department of Health said the total rose by 31 cases from Monday’s tally, extending the outbreak into 43 counties after Washington County was added to the list.
The department said hospital admissions linked to measles have risen to 251, up from 247 in the previous update, while the death toll remains at five. Officials said only four of the confirmed cases involved vaccinated people, underscoring the role of immunisation in limiting the spread of a disease that public health experts say is among the most contagious in the world.
The latest figures build on a rapid increase that has unfolded over the autumn. Pennsylvania reported 1,260 cases across 43 counties on October 16, up from 1,004 cases in 39 counties on October 5, according to state health department updates. Earlier in the outbreak, the state recorded 835 cases across 39 counties on September 23 and 693 cases across 38 counties on September 14, showing how quickly the virus has moved through communities.
State officials have expanded vaccination efforts as the caseload has grown. According to the department’s announcement, nurses have administered more than 10,000 measles, mumps and rubella vaccine doses this year through pop-up clinics and state health centres, while healthcare providers gave more than 56,000 doses in September alone, far above a typical monthly total of about 25,000. The department says two doses of the MMR vaccine provide about 97% protection, and it recommends an early dose for infants aged six to 11 months who live in or travel to areas with sustained community transmission. The federal Centers for Disease Control and Prevention is expected to support Pennsylvania further as officials work to investigate cases and strengthen the response.
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