Pennsylvania's measles outbreak added 119 cases in a single week, pushing the statewide total to 540, the state Department of Health reported Wednesday afternoon. Ninety-one people have been hospitalized this year, and two unvaccinated Lancaster County residents have died from measles-associated causes. Forty-three of the new cases were added since Monday's report, and Lancaster County remains the largest cluster with 242 cases.
The pace is the new information. Two days earlier, the department reported 497 cases across 34 counties, with 87 hospitalizations and 37 new cases since Aug. 28. The Friday before that, the count stood at 460 with 83 hospitalizations. A week of triple-digit growth marks a different phase of the outbreak.
The second development matters more for people who do not live near Lancaster. The department said someone who does not live in the state tested positive for measles and may have exposed others at a Turnpike service plaza in Westmoreland County. The exposure occurred at the New Stanton Service Plaza on the westbound Pennsylvania Turnpike on Aug. 17, and the areas involved include the Burger King, Starbucks, Sunoco, 7-11, restrooms, and dining area.
A Community Outbreak Reaching Travel Corridors
For most of this year, the practical risk was geographically bounded. The outbreak began in the Lebanon and Lancaster County area in the spring and stayed concentrated in southeastern and central Pennsylvania. Households elsewhere in the state could reasonably read the coverage as regional news.
A service plaza exposure changes that calculation. Turnpike plazas serve drivers moving between Pittsburgh, Harrisburg, and Philadelphia, and travelers from other states. The infected person was not a Pennsylvania resident, which means the exposure ran in both directions.
Measles is unusually well suited to that setting. The virus spreads when an infected person breathes, coughs or sneezes, and it remains infectious in the air and on surfaces for up to two hours after that person leaves the area. A traveler who stopped for coffee two hours after an infectious person left could still be exposed.
Anyone who was at the New Stanton plaza on the date in question is being urged to check vaccination status and watch for symptoms. Symptoms can start 7 to 21 days after exposure, beginning with fever, cough, runny nose, and red, watery eyes, followed by a rash that starts on the head and spreads downward.
The Numbers Behind the Case Count
Several figures deserve care because they come from different reporting moments. The 540 total and the 119-case weekly increase are current as of Wednesday afternoon. The 34-county figure dates to Monday and may now understate the spread.
As of late August, no confirmed infections had occurred in anyone who had received two MMR doses. Measles also moved into Butler and Westmoreland counties in western Pennsylvania in late August, each reporting one case.
About 30 percent of all cases are in people under 18. That is a meaningful detail for parents, because it means most cases are in adults, and adult vaccination status is often less well documented than a child's school record.
The department notes that nearly 20 percent of people who contract measles are hospitalized, and that death occurs in one to three patients per 1,000 cases. The 91 hospitalizations reported so far are consistent with that pattern.
One caveat belongs in the open. Some clinicians believe the published figure understates reality. Paul Offit wrote in his newsletter, as summarized by infectious disease researchers, that two deaths against a few hundred reported cases implies a mortality rate that "suggests that the outbreak is much worse than is claimed." That is an argument about undercounting, not a confirmed finding.
Households Most Affected and What Officials Advise
Risk falls hardest on infants too young for the first MMR dose, unvaccinated children and adults, pregnant people, and people with weakened immune systems. Residents of counties with lower vaccination coverage face more exposure by circumstance rather than by choice.
MedicalDaily previously reported on the deaths of two unvaccinated Lancaster County residents, the first confirmed American measles deaths of the year. The classification of one of those deaths, a newborn, remains disputed, and the pathologist who examined the infant does not believe the virus caused the death.
Cost should not be a barrier. The state's measles vaccination information notes that most private and commercial plans cover MMR at no cost, and the vaccine is available through health care providers, county and municipal health departments, state health centers, federally qualified health centers and the Vaccines for Children program. Two doses provide about 97 percent protection.
The department asks anyone with symptoms or a suspected exposure to call a provider before walking into a waiting room, or to use the state hotline at 877-PA-HEALTH. Calling first lets the office prepare so other patients are not exposed. Urgent evaluation is warranted for trouble breathing, severe dehydration, confusion, or seizure activity.
What remains unknown is whether the weekly pace holds, how many additional counties will report cases, and whether the Turnpike exposure produces secondary infections. The incubation window for the Aug. 17 exposure runs into early September. MedicalDaily will track both the count and any new exposure notices.
Key Questions Answered
How many measles cases does Pennsylvania have? 540 confirmed cases as of Wednesday afternoon, with 119 added over the prior week and 91 hospitalizations this year.
Where was the newly reported exposure? The New Stanton Service Plaza on the westbound Pennsylvania Turnpike in Westmoreland County, in mid-August, involving a person who lives outside the state.
Who is most at risk? Unvaccinated people of any age, infants too young for their first dose, pregnant people, and those with weakened immune systems.
How long after exposure do symptoms appear? Typically 7 to 21 days, starting with fever, cough, runny nose, and red eyes before a rash appears.
Are vaccinated people getting sick? As of the department's late-August reporting, no confirmed infections had occurred in anyone who had received both MMR doses.
Where can uninsured families get the MMR vaccine? Through state health centers, county and municipal health departments, federally qualified health centers and the Vaccines for Children program.
What should someone do if they think they were exposed? Call a health care provider before going in, or call 877-PA-HEALTH. Seek urgent care for trouble breathing, severe dehydration or confusion.
