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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.

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What can the world learn from China’s “zero-Covid” lockdown?

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Were bivalent boosters worth it?

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Operation Warp Speed was a huge success. So why is the US turning away from it?

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How the latest Covid-19 variant is shaping the course of the pandemic

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Xi Jinping has abandoned zero-Covid. What happens now?

22 predictions we made in 2022, and the 6 we got wrong

Why are American lives getting shorter?

One of our best Covid-19 treatments doesn’t work anymore. What now?

Ron DeSantis’s vaccine “investigation” is all about beating Trump

China’s health system isn’t ready for the end of “zero Covid”

Masked pedestrians walk past a US flag in a streetfront window in New York City on December 12, 2022.

Coronavirus explainers

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China’s Covid narrative is backfiring

How “zero-Covid” changed China — and the world

What makes China’s wave of protests different this time

The wave of protests testing China’s zero-Covid policy, explained

How to make Covid the last pandemic

Will America continue to turn away from vaccines?

Going home for the holidays? Boost, mask, and test beforehand.

Your free pandemic health perks are on the way out

How to read a controversial preprint paper on Covid’s origins

Our buildings are making us sick

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Zeynep Tufekci has been consistently ahead of the curve on Covid-19

Oops, we forgot to fix the supply chain

Why do labs keep making dangerous viruses?

The best thing you can do to quash a deadly Covid-19 surge this winter

A wave of anti-vaccine legislation is sweeping the United States

The child care crisis just keeps getting worse 

When, why, and how to get a new Covid-19 booster shot

New Covid-19 vaccine boosters are coming

Why Covid-19 death rates remain stubbornly flat

The two big pandemic investments we still need to make

Why monkeypox is a repeat of the data mistakes made with Covid-19

School vaccine mandates for Covid-19 are not happening

Should you get another Covid-19 vaccine booster now or wait for the new shots?

President Biden has rebound Covid. How risky is that?

You still need to tell your friends if you get Covid

The key to universal Covid-19 vaccines lies in your bones

The pandemic impulse purchases we grew to hate

During Covid, most governments just gave people money

We’ve all got Covid-19 fatigue, but BA.5 shows it’s not over

President Biden just tested positive for Covid-19. What happens now?

BA.5 doesn’t care that you just had Covid-19

Why BA.5 is cause for concern, but not alarm. Yet.

Just about everyone in America is finally eligible for a Covid-19 vaccine. Now what?

The Aftermath