Health Security

Infectious microbes constantly emerge and constantly mutate. To survive, we need extraordinary science and scientists.

The U.S. needs a national public health system. Here’s why—and how to create it.

The hygiene hypothesis says exposure to germs helps kids develop healthy immune systems. But many viruses didn’t circulate as widely during the pandemic. Are there downsides to missed infections?

With monkeypox case counts rising, metrics could tell us if the epidemiological picture is pointing in the right direction.

The public health system has been fragmented and haphazard for years, and COVID-19 showed just how consequential a weak system can be.