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


We still don’t have all the answers for why Covid-19 cases rise and fall, but there are some explanations.

Labels like “nonessential” are getting in the way of urgent treatments and surgeries. There’s a better way.

How our Covid-19 backslide taught us there may be no going back to “normal.”

Evidence suggests ivermectin is not a Covid-19 “miracle drug.” How did it get so popular?

Why we still can’t sleep, and what to do about it.

Pandemic failures have sometimes led to deadly care rationing.


A trio of new studies from the CDC shows that Covid-19 vaccines remain highly effective against severe illness.


They probably are, but that doesn’t mean that a right-wing judiciary will uphold them.

The trial of Elizabeth Holmes, former CEO of Theranos, isn’t a reckoning for the tech industry.


How most of Europe caught up to — and then surpassed — the US in their Covid-19 vaccine drives.


The global aftershocks of Covid-19 and the economic crisis it caused, explained.

A realistic Covid-19 endgame requires accepting some risk. The question is how much.

Hundreds of psychologists looked for ways to make people feel better during the pandemic — and they found one.


An astonishing one in three US workers does gig work now.


Several US cities have instituted vaccine passport systems for indoor dining.


Supply chain delays, shortages, and delivery issues are here to stay.


US testing numbers have been consistently bad because there is no real strategy.

And 8 other questions families have this fall, answered by experts.


The anti-vax fertility panic, explained.

Here’s what we know about long Covid — with some hope for the future.


Hospitals in the South are already stretched with coronavirus patients. The powerful storm could make things worse.

As Covid-19 continues to wreak havoc, humans still aren’t doing enough to prevent the next pandemic.

Most Covid-19 drug treatments that have been included in trials haven’t panned out. A large new study suggests fluvoxamine might be different.

We need new mental models to make sense of the pandemic as it exists today.

The Florida surge is a microcosm of a summer gone wrong.


The Pfizer/BioNTech shot got the green light from regulators — which could encourage some holdouts to get vaccinated.


Eight states, including Florida and Texas, are trying to ban mask mandates.

Covid-19 vaccines still are effective in preventing hospitalization. But vaccinated people are more likely to get sick than before.


Some of Florida’s most populous counties don’t want their children to get Covid-19.

Walmart, Uber, and McDonald’s are requiring office workers to get vaccinated. Stores, cars, and warehouses are a different story.

India’s health system was broken. Then the delta surge arrived.

Facebook is being cagey about Covid-19 content on its platform, researchers say.

Nurses were struggling even before the pandemic. We have the tools to change that.

Republican lawmakers in Texas have put political ambition above public good amid statewide crises.


“These waves are just something you have to deal with.”


The coronavirus may never truly go away.


Overdose deaths surged during Covid-19. But suicides declined. What happened?


Viral clips show anti-maskers melting down as a school board implemented a commonsense mask mandate.



