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Evidence-based explanations of the Covid-19 pandemic, including how it started, how it might end, and how to protect yourself and others.

3 pandemic metrics that could tell us what’s next

The faulty foundation of our new post-pandemic normal

How to think about masking on planes, trains, and buses right now

Shanghai’s zero Covid nightmare

Welcome to the choose-your-own-adventure phase of the pandemic

The Trump judge’s opinion striking down the airplane mask mandate is a legal disaster

How China’s zero-Covid policy is failing Shanghai

It’s time to think outside the mask mandate

The CDC’s new Covid-19 guidelines are facing their first test with BA.2

The secrets hidden in sewage

They warned about pandemics before Covid-19. Now they have a $100 billion plan to stop the next one.

What the media needs to get right in the next pandemic

Can we 3D print a better face mask?

How to future-proof your life from pandemics and other threats

The good and bad news about the current Covid-19 wave

A survey on global mental well-being shows that the kids are not all right

America needs more doctors and nurses to survive the next pandemic

What immunocompromised people need to know right now

How sewage can warn us about the next pandemic

How to test and trace a virus we haven’t discovered yet

Congress is cutting corners on Covid-19 funding. We may pay for it later.

Why experts are terrified of a human-made pandemic — and what we can do to stop it

Finding the next pandemic virus before it finds us


We need to be developing vaccines for the next pandemic — right now

The Biden administration is ending a controversial border policy

Who should get a fourth Covid-19 vaccine shot — and when?

Covid-19 safety doesn’t have to be all or nothing. Here’s how to think about it going forward.

Why well-qualified medical school graduates can’t get jobs — despite doctor shortages

How Hong Kong’s pandemic success story turned into a nightmare

Congress’s epic pandemic funding failure

How the next pandemic surge will be different

Covid-19 cases are exploding in Asia. Here’s what it means for the rest of the world.


Are we done with face masks?

The surprising link between Covid-19 deaths and ... internet access

What’s in Congress’s $1.5 trillion appropriations bill

Nice raise. Too bad about inflation. 

We have the best view yet of Covid-19’s origins. What should we do about it?

A grand Supreme Court showdown over gerrymandering ends in a whimper

You can now order more free Covid-19 rapid tests from Biden’s program