Michaeleen Doucleff
Stories
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Health
Take a look at SARS-CoV-2's family tree. It's full of surprises
The family history of SARS-CoV-2 is not what virologists expected — and sheds light on the virus that launched a pandemic. Check out our illustration of the virus' family tree.
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Health
A second version of omicron is spreading. Here's why scientists are on alert
It's a sibling of the first omicron variant that swept the world. Is it more contagious? Does it cause severe disease? Will it keep current omicron surges going? Researchers are looking for answers.
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Health
A new version of the omicron variant has scientists on alert
Another version of omicron is spreading in Asia and parts of Europe. And it shows signs that it could be slightly more contagious than omicron. Where did this new variant come from?
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Health
Booster longevity: Data reveals how long a third shot protects
Now researchers in the U.K. have the first estimates for how long a third shot of the Pfizer vaccine will last. The findings are mixed.
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Health
Fact check: The theory that SARS-CoV-2 is becoming milder
A look at the data that omicron is less severe. What does that mean for the future of SARS-CoV-2 — and the pandemic?
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Science
Why omicron may cause less harm — and what it means for the future of the pandemic
There's growing evidence that omicron causes less severe disease than previous variants. Does that mean SARS-CoV-2 is evolving into a more mild virus? Will future surges be less deadly and disruptive?
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Health
What we know about the symptoms — and the severity — of the omicron variant
Researchers are looking at data from U.S. cases to determine if the variant causes milder disease. Even if the answer is yes, they say, rates of hospitalization could be high during the surge.
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Health
Omicron causes record-breaking COVID cases in the U.S. and globally
The U.S. on Wednesday counted more than 480,000 COVID-19 cases in a single day. Cases increased nearly 70% over the past week, but hospitalizations have gone up only about 12%.
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National
Encore: Encouraging collaboration early on can lead to more helpful children
In many cultures around the world, parents don't need chore charts or allowances for kids to pitch in around the house. A new study shows how parents in these cultures teach children to be helpful.
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National
Boosters have been shown to restore some of the protection lost with omicron's rise
Scientists know the omicron variant will cause many breakthrough infections. Given that omicron is now the dominant strain in the U.S., maybe it's time to rethink that booster shot.