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News Articles: SARS-CoV-2

A poster in Kolkata, India, from peak pandemic days sends a message to mask up. Now that the official COVID-19 global emergency is no longer in effect, some folks are thrilled to stop masking — but others wonder if it's a good idea to keep up certain precautions.

Tagged as: 

  • Global Health

Coronavirus FAQ: 'Emergency' over! Do we unmask and grin? Or adjust our worries?

Now that official COVID emergency declarations have ended, how should people evaluate their risk of SARS-CoV-2? That's the subject of our frequently asked questions offering.

May 15, 2023
|
By:
  • Fran Kritz
Security guards stand in front of the Huanan Seafood Wholesale Market in Wuhan, China, on Jan. 11, 2020, after the market had been closed following an outbreak of COVID-19 there. Two studies document samples of SARS-CoV-2 from stalls where live animals were sold.

Tagged as: 

  • Global Health

What does the science say about the origin of the SARS-CoV-2 pandemic?

Two U.S. intelligence agencies reportedly support the lab leak theory — with low-to-moderate confidence. No evidence has been shared. Scientists have strong evidence of animal spillover at a market.

March 01, 2023
|
By:
  • Michaeleen Doucleff

Tagged as: 

  • Global Health

How do pandemics begin? There's a new theory — and a new strategy to thwart them

Animals carry millions of pathogens. So it's a daunting task to find the one with the greatest potential to spark a pandemic. Now scientists are rethinking the way they hunt for that next new virus.

February 16, 2023
|
By:
  • Michaeleen Doucleff

Tagged as: 

  • Global Health

QUIZ: How much do you know about what causes a pandemic?

As we launch a series about spillover viruses — like SARS-CoV-2, which triggered a global pandemic, you may have a lot of questions. So do we — 7, to be exact, in the quiz below. See how you do.

February 02, 2023
|
By:
  • Michaeleen Doucleff
China is doing many millions of tests a day to uncover cases of COVID-19 — part of its zero-COVID policy. Above: People line up for nucleic acid tests to detect the virus at a public testing site on Nov. 17 in Beijing.

Tagged as: 

  • Health

Why China's 'zero COVID' policy is finally faltering

For nearly three years, China has enforced incredibly strict rules to keep coronavirus transmission in check. But now they're facing a potentially deadly omicron surge.

November 30, 2022
|
By:
  • Michaeleen Doucleff and
  • Steve Inskeep
The black flying fox is one of the bats in Australia that carries the Hendra virus — which sometimes spills over to horses, and humans, with devastating impact. Scientists are trying to figure out what triggers spillovers — and how to stop them.

Tagged as: 

  • Global Health

An elegant way to stop deadly Hendra virus spillovers from bats to horses ... to us

New research points to a surprising way to stop spillovers of Hendra virus, which is harbored by bats. It's not often that it jumps to horses, then humans, but when it does, the result are brutal.

November 17, 2022
|
By:
  • Ari Daniel
Sikhulile Moyo, the laboratory director at the Botswana-Harvard AIDS Institute and a research associate with the Harvard T.H. Chan School of Public Health, headed the team that identified the omicron variant.

Tagged as: 

  • Global Health

Whatever happened to the Botswana scientist who identified omicron — then caught it?

Sikhulile Moyo led the team that first identified omicron — and was dismayed by the world's reaction — blaming and blacklisting African nations. He's now a bit more optimistic.

September 02, 2022
|
By:
  • Melody Schreiber
Cracking a window can help reduce your risk of infection by COVID pathogens.

Tagged as: 

  • Global Health

Coronavirus FAQ: Got any tips on improving indoor air flow to reduce infection risks?

"Ventilation is the way forward," says infectious disease doctor Abraar Karan of Stanford. Here's how to get better air flow at home, in schools and offices — even in gyms — to stave off COVID.

June 29, 2022
|
By:
  • Melody Schreiber
Cracking a window can help reduce your risk of infection by COVID pathogens.

Tagged as: 

  • Global Health

Coronavirus FAQ: Got any tips on improving indoor air flow to reduce infection risks?

"Ventilation is the way forward," says infectious disease doctor Abraar Karan of Stanford. Here's how to get better air flow at home, in schools and offices — even in gyms — to stave off COVID.

June 29, 2022
|
By:
  • Melody Schreiber
A woman wears a face shield to protect against COVID-19 at a taxi stand in Soweto, South Africa, where an omicron variant is causing a COVID-19 surge.

Tagged as: 

  • Global Health

If you've had omicron before, are you safe from infection by the new variants?

New versions of omicron are circulating in the United States and South Africa. Two new studies shed light on the potential for future surges — and the risk factor if you've already had omicron.

May 07, 2022
|
By:
  • Michaeleen Doucleff

Tagged as: 

  • Global Health

Coronavirus FAQ: Testing confuses me! When to do it? Is 'negative' always reliable?

With COVID case counts falling and rising, testing is critical. But how many days after exposure should I test? And if I have symptoms but test negative, might the test not be accurate?

April 16, 2022
|
By:
  • Melody Schreiber
Rosy, 6, gives COVID tests and vaccines to her stuffed animals. She herself has been exposed to SARS-CoV-2, the coronavirus that causes COVID-19, multiple times and never tested positive. What's her secret?

Tagged as: 

  • Global Health

Why hasn't my daughter caught COVID? 2 factors likely protect her — and maybe you too

My 6-year-old has been exposed to SARS-CoV-2 at least four times and never tested positive. Many people fall into that category. Researchers have theories about why they've been able to ward it off.

April 08, 2022
|
By:
  • Michaeleen Doucleff

Tagged as: 

  • Global Health

Delta and omicron met up inside 1 person and made the Frankenstein hybrid 'deltacron'

That's how the so-called "deltacron" variant — a mashup of delta and omicron — came to be. This process of recombining tells us a lot about the possible past and future of SARS-CoV-2.

March 24, 2022
|
By:
  • Michaeleen Doucleff
Two white-tailed deer forage in Pennsylvania's Wyomissing Parklands. At the end of 2021, researchers swabbed the noses of 93 dead deer from across the state. Nearly 20% tested positive for the coronavirus.

Tagged as: 

  • Animals

Researcher finds 'stunning' rate of COVID among deer. Here's what it means for humans

Studies on white-tailed deer in Pennsylvania and Ontario offer evidence that the mammals are a reservoir for the coronavirus. What are the implications for the course of SARS-CoV-2?

March 09, 2022
|
By:
  • Ari Daniel
A hamster named Marshmallow was dropped off at the New Territories South Animal Management Centre in Hong Kong on Jan. 19 over concerns that pets were spreading the coronavirus to humans. Thousands of small animals were culled after hamsters tested positive in a pet store.

Tagged as: 

  • Global Health

The hamsters of Hong Kong offer a cautionary COVID tale

A new study documents that infected hamsters, imported from the Netherlands, passed the virus on to humans. Previously only minks had been identified as a source of animal-to-human transmission.

February 10, 2022
|
By:
  • Melody Schreiber
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