Pennsylvania’s measles outbreak continued to grow Monday, with state
health officials reporting 792 cases. The total increased by 25 cases
from Friday, keeping Pennsylvania at the center of one of the most
serious U.S. measles outbreaks in decades.
The continued increase comes as public-health workers conduct
vaccination clinics, trace exposures and monitor people who may have
come into contact with infected patients. Health officials have
repeatedly warned that measles spreads extremely easily among people
who are not immune.
Measles is transmitted through respiratory droplets and airborne
particles, and the virus can remain in the air for as long as two
hours after an infected person leaves an enclosed space. Symptoms
typically begin with fever, cough, runny nose and red eyes before the
characteristic rash develops.
Although many patients recover, measles can cause pneumonia, brain
inflammation and other serious complications. Infants, pregnant
people, people with weakened immune systems and those who are
unvaccinated face particular concern when exposure occurs.
Pennsylvania has also reported measles-associated deaths during the
2026 outbreak, while federal and state officials have differed over
how those deaths are reflected in national statistics. The Centers for
Disease Control and Prevention has been working on a standardized
definition for reporting measles deaths nationally.
Public-health authorities continue to recommend the measles, mumps and
rubella vaccine as the primary protection against infection and severe
disease. People who believe they have been exposed are generally
advised to contact a health provider before arriving at a clinic or
waiting room so precautions can be taken to avoid exposing others.
