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Moderna’s coronavirus vaccine elicits a strong immune response in children aged 6 to 11, researchers reported on Wednesday — another signpost in what has become a long and tortuous road to protecting young children against the virus, even as cases again inch upward. On Monday, Moderna requested authorization from the Food and Drug Administration for […]
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La BA.2, una subvariante altamente contagiosa de la variante ómicron, ha causado la preocupación de las autoridades de salud al convertirse en la versión dominante del coronavirus en todo el mundo. Hasta ahora, los indicios apuntan a que la BA.2 es entre un 30 por ciento y un 80 por ciento más transmisible que la […]
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Sixty percent of Americans, including 75 percent of children, had been infected with the coronavirus by February, federal health officials reported on Tuesday — another remarkable milestone in a pandemic that continues to confound expectations. The highly contagious Omicron variant was responsible for much of the toll. In December 2021, as the variant began spreading, […]
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“If this becomes a precedent, that a judge can overrule government and C.D.C. experts, that puts us in a problematic place for the next surge, the next pandemic, bioterrorism or who knows,” Dr. Wachter said. “Government needs to be able to act, and to imply government does not have that authority is deeply concerning.” He […]
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As the Omicron coronavirus surge subsides, researchers are keeping an eye on a highly transmissible subvariant known as BA.2. Although it doesn’t appear to have the capacity to drive a large new wave of infections, the variant could potentially slow the current decline of Covid cases and make treatments more difficult. Here’s what we know […]
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In recent days, scientists have reported that a hybrid of the Omicron and Delta coronavirus variants has been popping up in several countries in Europe. Here’s what is known so far about the hybrid, which has picked up the Frankensteinian nicknames of Deltamicron or Deltacron. How was it found? In February, Scott Nguyen, a scientist […]
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Memory B cells become increasingly sophisticated over time, and they learn to recognize a diverse set of viral genetic sequences. The longer they have to practice, the broader the range of virus variants they can thwart. Researchers showed last year that the elite school inside of lymph nodes where the B cells train, called the […]
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¿Cuándo es el mejor momento para recibir un refuerzo? No hay una regla fija sobre cuándo programar una vacuna de refuerzo después de haber tenido COVID-19. El momento óptimo dependerá de tus circunstancias individuales, incluyendo la gravedad de tu enfermedad, el tiempo transcurrido desde la resolución de los síntomas y el riesgo de volver a […]
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Booster shots of the Pfizer-BioNTech and Moderna vaccines are not just reducing the number of infections with the highly contagious Omicron variant, they’re also keeping infected Americans out of hospitals, according to data published on Friday by the Centers for Disease Control and Prevention. The extra doses are 90 percent effective at preventing hospitalization with […]
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The Centers for Disease Control and Prevention was long revered for its methodical and meticulous scientific approach. Agencies in other nations modeled themselves after the world’s most highly regarded public health authority, even adopting the name. At the outset of the pandemic, the C.D.C. moved at its accustomed pace. But this time, with a novel […]
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The complications Saliva also has trade-offs. While the virus appears to build up in saliva early, the nose may be a better place to detect it later in the course of infection. Researchers at the California Institute of Technology found that while the virus often spiked first in saliva, it ultimately rose to higher levels […]
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The number of hospitalized young children infected with the coronavirus rose precipitously last week to the highest levels since the beginning of the pandemic, according to data released on Friday by the Centers for Disease Control and Prevention. The increase was observed in children who were 4 and younger, who are not eligible for vaccination, […]
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