Pennsylvania health officials confirmed on Wednesday that one of the two people whose deaths the state described as measles-associated was a newborn, a detail the department withheld when it announced the deaths a day earlier. Both were unvaccinated Lancaster County residents, and the deaths were the first in the state in 35 years and the first in the United States tied to measles this year.
The disclosure landed alongside a direct disagreement over what the two deaths represent. Lancaster County Coroner Stephen Diamantoni told abc27 that no deaths attributed to measles have been referred to or investigated by his office. He said in an interview with The Philadelphia Inquirer that the newborn died shortly after birth from a laceration of the spleen, that measles antibodies were present in postmortem testing, and that the forensic pathologist who performed the autopsy did not consider the death measles-related. His investigation is ongoing. County Commissioner Josh Parsons said the coroner told him his office has recorded zero measles deaths and one death of a person who died with measles.
For parents of babies, the age detail still changes the story in a way the case counts did not. Infants under 12 months are generally too young for a routine first MMR dose. They do not have their own protection, and they depend entirely on the vaccination status of everyone around them.
Babies Sit Outside the Standard Schedule for a Reason
The first MMR dose is recommended at 12 to 15 months and the second at 4 to 6 years. The timing is not arbitrary. Maternal antibodies passed across the placenta protect a newborn for several months and also interfere with how well the vaccine takes, so an earlier routine dose would work less reliably.
That leaves a window of roughly a year in which a baby has fading borrowed protection and no vaccine of their own. In a community with high coverage, the virus never reaches that baby. In a community where coverage has slipped, it can.
Measles is unusually good at exploiting the gap. Up to nine in ten susceptible people exposed to it become infected, and the virus lingers in the air of a room for up to two hours after an infected person has left it. Infants are also among the groups most likely to develop complications, including pneumonia and encephalitis.
Pennsylvania has recommended an early MMR dose for infants aged 6 to 11 months in counties with active transmission. That early dose does not count toward the routine two-dose series, and families in Lancaster and surrounding counties can ask a pediatrician whether their child qualifies.
What Changed Since MedicalDaily's Earlier Report
MedicalDaily reported on Tuesday that Pennsylvania had confirmed the first US measles deaths of the year and that officials had specifically declined to say whether either case involved an infant or a pregnant woman. That question has now been partly answered.
Three things are new. One of the two deceased was a newborn. The coroner has described a cause of death for that infant that is not measles. And the state and the county are describing the same events in incompatible terms.
The state health department has explained its terminology. A spokesperson said Pennsylvania uses the phrase measles-associated when laboratory or epidemiologic evidence of measles is present, even where a medical certifier or coroner has not determined measles to be the immediate cause of death, and disputed the assertion that every measles death would automatically reach a coroner, noting that not all deaths are referred to one under state law.
That is a recognized surveillance definition. It is also not the same claim as saying two people died of measles, which is the distinction Parsons has pressed publicly. Readers should hold both: the state's classification is a standard public health category, and the underlying cause of death for at least one of the two has been described by the county's own coroner as something else.
The dispute has since drawn in federal officials, with Health and Human Services Secretary Robert F. Kennedy Jr. publicly questioning the deaths and Governor Josh Shapiro accusing him of spreading misinformation. Neither exchange has produced additional medical documentation, and the underlying records remain unreleased.
The Numbers Behind the Outbreak
Pennsylvania has confirmed 424 measles cases this year, with 94 diagnosed in the past week alone. Seventy-three people have been hospitalized. Lancaster County accounts for the largest share, with 197 cases, NBC News reported.
The county's immunization data explains much of the concentration. MMR coverage among Lancaster County children fell from 95.5 percent in 2017 to 87.6 percent last year. Measles requires close to 95 percent coverage to stop circulating, and below that threshold each introduction has room to spread.
Nationally, the CDC's measles data page listed 2,777 confirmed cases as of August 20, the highest annual total since 1991. The Pan American Health Organization is expected to decide in November whether the United States has lost the measles elimination status it has held since 2000.
These figures come from different reporting cycles and should not be added together or compared directly. State and federal counts are revised as laboratory confirmation catches up.
Steps That Actually Reduce Risk for a Baby
Families with an infant in or near the outbreak zone have a short list of useful actions.
Confirm that everyone in the household has two documented MMR doses. That includes teenagers and adults, who are the most common source of an infection brought home to a baby. Two doses give about 97 percent protection.
Ask a pediatrician about an early dose for a baby aged 6 to 11 months if you live in a county with active transmission or are traveling to one. Pennsylvania offers free vaccination through state health centers in nearly every county, and pop-up clinics have been running in the Lancaster region.
Call ahead rather than walking into a waiting room. Anyone with fever plus rash, cough, runny nose, or red eyes should phone the office first so staff can prepare. Symptoms can appear 7 to 21 days after exposure. Trouble breathing, severe dehydration, confusion, or seizure activity in a child needs urgent evaluation.
What remains unknown is substantial. The age of the second person who died has not been released, nor has any description of that case. The coroner's investigation into the newborn has not concluded, and the state has not released the records underlying either classification. Pennsylvania updates its measles dashboard regularly.
Key Questions Answered
What is the new information? Pennsylvania confirmed that one of the two people whose deaths it called measles-associated was a newborn. The state had withheld ages when it announced the deaths.
What is the disagreement about? The county coroner says the newborn died of a ruptured spleen shortly after birth, that the autopsy pathologist did not consider the death measles-related, and that no deaths attributed to measles have been referred to his office.
What does measles-associated mean? The state uses the term when laboratory or epidemiologic evidence of measles is present, even if a coroner or medical certifier has not named measles as the immediate cause of death.
Why are infants at higher risk? The routine first MMR dose comes at 12 to 15 months. Younger babies have fading maternal antibodies and no vaccine protection of their own, and they are among the groups most likely to develop complications.
Can a baby under one get vaccinated? In counties with active transmission, Pennsylvania recommends an early dose for infants aged 6 to 11 months. It does not count toward the routine two-dose series. Ask a pediatrician.
How large is the outbreak? Pennsylvania has confirmed 424 cases this year with 94 in the past week and 73 hospitalizations. Nationally, the CDC listed 2,777 cases, the most since 1991.
What should a household with a baby do first? Confirm two documented MMR doses for every other member of the household, since older children and adults are the usual route by which the virus reaches an infant.
