By Roger Bate at Brownstone dot org.

The Washington Post recently published a detailed investigation showing that childhood vaccination rates across the United States are falling sharply, particularly for measles. Fewer counties now meet the 95 percent coverage level commonly associated with herd immunity, and millions of children attend schools in communities below that threshold.

On the basics, it's true that routine childhood measles shots are among the most effective measures for keeping that particular infection at bay. But the Post's analysis fails where it matters most: it cannot explain why trust has collapsed so broadly, so persistently, and so rationally for many ordinary people.

Instead, readers are offered a familiar diagnosis. Distrust of authorities. Political polarization. Misinformation. Backlash against mandates. All of this is curiously detached from responsibility. The article describes the consequences of distrust without confronting its causes.

That omission is not accidental. It reflects a broader unwillingness among elite media and public health institutions to reckon honestly with Covid-era failures. And without that reckoning, efforts to restore vaccine confidence are unlikely to succeed.

This is not an argument against vaccines. It is an argument about credibility.

During the Covid-19 period, public health authorities repeatedly overstated certainty, minimized uncertainty, and treated legitimate scientific disagreement as a threat rather than a feature of good science.

Claims about vaccines preventing infection and transmission were presented as settled fact, not evolving hypotheses. When those claims weakened or collapsed under new evidence, they were revised quietly, without acknowledgment of error.

The same pattern appeared across other policies: masking, school closures, natural immunity, and population-level risk. Positions shifted, sometimes dramatically, but rarely with public explanation. The message conveyed—intentionally or not—was that narrative management mattered more than transparency.

This mattered because trust is cumulative. People do not evaluate each public health recommendation in isolation. They judge institutions based on patterns of behavior over time. When authorities insist they were always right, even when claims visibly change, credibility erodes.

Worse, dissent was often suppressed rather than debated. Scientists and clinicians who questioned prevailing policies—on lockdowns, school closures, or mandates—were frequently labeled as misinformation spreaders rather than engaged on the merits. Government coordination with social media platforms blurred the line between combating falsehoods and policing debate. Once that line is crossed, institutional trust does not merely decline—it inverts.

None of this requires assuming bad faith. Emergencies are hard. Decisions were made under pressure. But good faith does not excuse overstatement, nor does difficulty justify refusing retrospective evaluation.

The result of this approach is now visible in the data the Washington Post reports—but does not explain.

Evidence from Pennsylvania illustrates the point. Montgomery County, a large, affluent, highly educated Philadelphia suburb, has historically had strong vaccination uptake and robust healthcare access. It is not a place easily dismissed as anti-science or anti-medicine.

Yet my physician survey research conducted in the county during and after the pandemic tells a different story. Clinicians reported that while initial Covid vaccine uptake was high in 2021, acceptance declined sharply over time, particularly for boosters. More importantly, many physicians observed a spillover effect: growing hesitancy not only toward Covid vaccines, but toward other vaccines as well.

Patients were not primarily citing technical fears about vaccine safety. They were expressing distrust of public health authorities. They referenced shifting claims, perceived exaggeration, and the absence of acknowle...