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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.

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

Maternity wards are shuttering across the US during the pandemic

The closures could make giving birth more dangerous in the United States.

There’s no good way to roll back mask mandates

The long, strange history of anti-vaccination movements

Inflation, explained by eggs

How the era of travel nursing has changed health care

Is the worst of the Covid-19 pandemic behind us? We asked 8 experts.

2 big reasons America’s booster rates are lagging


How American conservatives turned against the vaccine

What the world got right during the Covid-19 pandemic

The Supreme Court is not being honest with you

What can actually convince vaccine skeptics to get their shots

Why were scientists so slow to study Covid-19 vaccines and menstruation?

The health system isn’t ready for an advanced cancer surge

The best $540 we ever spent: An indoor garden that made us feel connected

Democratic governors are trying to move on from a pandemic that’s still happening

Will schools require Covid-19 vaccines for students?

They save skiers and hikers in the wilderness. Here’s how they think about resilience.

Search-and-rescue responders have powerful new ways of recovering from trauma.

We regret to inform you that we are now discussing subvariants

Is the FDA too cautious?

I’m vaxxed, boosted, and just had Covid-19. Can I relax now?

Who actually needs a fourth Covid-19 shot?

Why young children have waited so long for Covid-19 vaccines

How Brazil survived its president’s vaccine skepticism

The science behind the omicron wave’s sharp peak and rapid decline

Here’s how to get the most out of free tests and N95s

A bizarre Wisconsin hospital lawsuit shows how Covid-19 gave workers new leverage

How to heal our national exhaustion

The extraordinary success of Covid-19 vaccines, in two charts

Omicron’s most crucial warning: A disease can move much faster than we can

What you need to know about Biden’s 400 million mask plan

The hidden lesson in the new free Covid-19 tests

How to spot the signs of long Covid — and what to do next

The frustrating Covid-19 test reimbursement process is a microcosm of US health care

Why Covid-19 is always one step ahead of the US response

Could a universal Covid-19 vaccine defeat every variant?

Am I asymptomatic, or do I just really not want to have Covid-19? A guide.

We’ll never have a normal flu season again