Health Security

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.

How yet another virus has escalated to crisis levels in a short period of time, the danger of ignoring health challenges facing the developing world, and the future of global public health challenges.

Current international treaties haven't been enough to stop large-scale pandemics and mount effective preparedness and response. Is a pandemic treaty the answer?

Crystal Watson answers more COVID-19 questions.

In 2021, public health endured some enormous losses, but made some major gains and is closing out the year with so much left to do.

 A couple long years into the COVID-19 pandemic, it can be easy to think of it as a once-in-a-generation event. Instead, the pandemic should be viewed as “a warning shot” in the face of mounting biological threats  that countries still aren’t prepared to meet, according to…

Additional data, emerging variants, and new understandings of the disease update our earlier thinking about herd immunity for Covid-19.

A new report from CommuniVax provides recommendations to better serve groups with persistently low vaccine coverage.

A public health expert and Olympic silver medalist’s take on the safety of the Tokyo Olympics.

The delta variant is cause for concern from a global health standpoint.

There’s still a lot we don’t know about COVID-19.