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Touring Trinity, the Birthplace of Nuclear Dread

We continued through a gate and down a path lined with barbed wire, Keep Out signs and warnings about rattlesnakes, to a fenced-in area littered…

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Vaccinated People May Spread the Virus, Though Rarely, C.D.C. Reports

In yet another unexpected and unwelcome twist in the pandemic, the Centers for Disease Control and Prevention released on Friday a report strongly suggesting that…

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How Often Do the Vaccinated Spread Covid-19?

The recommendation that vaccinated people in some parts of the country dust off their masks was based largely on one troublesome finding, according to Dr.…

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C.D.C. Internal Report Calls Delta Variant as Contagious as Chickenpox

The Delta variant is much more contagious, more likely to break through protections afforded by the vaccines and may cause more severe disease than all…

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C.D.C. Says Some Vaccinated Americans Should Wear Masks Again

Revising a decision made just two months ago, the Centers for Disease Control and Prevention said on Tuesday that people vaccinated against the coronavirus should…

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As Virus Cases Rise, Another Contagion Spreads Among the Vaccinated: Anger

As coronavirus cases resurge across the country, many inoculated Americans are losing patience with vaccine holdouts who, they say, are neglecting a civic duty or…

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Why Vaccinated People Are Getting ‘Breakthrough’ Infections

In any case, immune defenses primed by the vaccines should recognize the virus soon after infection and destroy it before significant damage occurs. “That is…

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This Is as Close to a Shark’s Intestines as You’ll Ever Hope to Get

The inside of a shark is full of curiosities, starting with rows of hardworking teeth that can be replaced by fresh ones throughout its life.…

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