Health headlines can distort both risk and proportion

Pennsylvania recently announced two “measles-associated” deaths during its measles outbreak. Gov. Josh Shapiro pointed to the deaths while warning about falling vaccination rates. Health Secretary Robert F. Kennedy Jr. challenged the state’s account and questioned whether either person had actually died from measles.

One death involved a newborn who had measles, apparently acquired before birth, but died after a lacerated spleen caused massive internal bleeding. The Lancaster County coroner said measles was not the cause. His office initially could not identify the second death Pennsylvania was referring to. Another person with measles has since come under investigation, but whether measles caused or contributed to that death has not been established publicly.

The word Pennsylvania used was “associated.” That can mean something very different from “caused by.” A disease may be present when someone dies, may contribute to the death, or may actually start the chain of events that kills the person. Yet “measles-associated death” can become “measles-related death,” then simply “measles death.” By the time it reaches a headline, many readers hear “died from measles.”

COVID made the problem familiar. We spent years arguing about dying “with” COVID or “from” it, even though those choices were incomplete. A disease can be the underlying cause, a contributing cause, or simply present. The distinction matters, but it is easy to lose once a technical classification starts moving through government statements, politics, and news reports.

The denominator can change the picture just as much. Before widespread vaccination, the CDC estimates that 3 to 4 million Americans contracted measles each year, while only about 500,000 cases were reported. By the late 1950s, roughly 400 to 500 deaths occurred annually. Using reported cases, the risk looks about one death in a thousand. Using estimated infections, it is roughly one death for every 6,000 to 10,000 infections.

Measles mortality had also fallen sharply before widespread vaccination even though nearly every child still contracted the disease. Nutrition, living conditions, medical care, hydration, and treatment of secondary infections had all changed. Vaccination later greatly reduced infection itself. The history is not simple, but it does show that infection alone does not determine what happens next.

Neither does a global number tell everyone the same thing. Tens of thousands still die from measles worldwide, disproportionately young children living where malnutrition, vitamin A deficiency, and poor medical access remain serious problems. Those deaths are real, but they do not provide a meaningful estimate of the mortality risk facing a healthy school-age child in the United States. Healthy children can still develop pneumonia, encephalitis, or the rare delayed neurological disease SSPE, but the practical risk changes with age, health, nutrition, and care.

After working this hard just to understand measles risk, another question comes up… what deserves our attention?

The United States recorded three confirmed measles deaths over roughly the preceding decade. Over the same ten years, estimates of diet-related deaths range from about 3.2 million using a narrow cardiometabolic estimate to about 10 million using HHS’s broader estimate, and 12 million using Kennedy’s figure. Those estimates are calculated differently, but the difference in scale is enormous.

There is still a straightforward public-health case for taking measles seriously. It is highly contagious, vaccination reduces the susceptible population, and waiting for a large death toll before responding would make little sense. Kennedy is pointing to a different problem. A few infectious-disease deaths can command national attention while diet-related and metabolic disease kills and disables people year after year until the suffering starts to look normal.

A sudden outbreak is visible. Chronic disease builds quietly through years of food, metabolism, activity, environment, and daily life. One can demand immediate action while the other becomes background noise.

The Pennsylvania dispute began with two deaths and one slippery word, “associated.”

Before deciding what those deaths tell us about measles, we have to know what that word actually means. And before deciding what deserves our fear or attention, it helps to put the number beside the much larger health problems we have learned to live with.

Seth Schneider is a health columnist for the Bonner County Daily Bee.