J.&J. Vaccine May Be Less Effective Against Delta, Study Suggests

Many who received the shot may need to consider boosters, the authors said. But federal health officials do not recommend second doses. By Apoorva Mandavilli The coronavirus vaccine made by Johnson & Johnson is much less effective against the Delta and Lambda variants than against the original virus, according to a new study posted online on Tuesday. Although troubling, the […]

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Delta Variant Widens Gulf Between ‘Two Americas’: Vaccinated and Unvaccinated

Even as many Americans celebrate the apparent waning of the pandemic, the thrum of concern over the so-called Delta variant grows steadily louder. The variant, the most contagious version yet of the coronavirus, accounts for more than half of new infections in the United States, federal health officials reported this month. The spread of the variant has prompted a vigorous […]

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Johnson & Johnson Vaccine Protects Against Delta Variant, Company Reports

The vaccine also produced long-lasting immune responses, researchers said. Booster shots seem unnecessary, at least for now. By Apoorva Mandavilli The Johnson & Johnson coronavirus vaccine is effective against the highly contagious Delta variant, even eight months after inoculation, the company reported on Thursday — a finding that should reassure the 11 million Americans who have gotten the shot. The […]

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Pfizer and Moderna Vaccines Are Likely to Produce Long-Lasting Immunity, Study Suggests

Close examinations of more than a dozen vaccinated people found that immune cells were still organizing to fight the coronavirus months after inoculation. By Apoorva Mandavilli The vaccines made by Pfizer-BioNTech and Moderna set off a persistent immune reaction in the body that may protect against the coronavirus for years, scientists reported on Monday. The findings add to growing evidence […]

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Many Alzheimer’s Experts Say Use of Aduhelm Should Be Sharply Limited

A new drug for the treatment of Alzheimer’s disease should be given to a much narrower group of patients than the federal approval permits, Alzheimer’s experts — including those who strongly supported approval of the medication — said on Monday. Since the Food and Drug Administration approved the controversial and expensive drug, Aduhelm, made by Biogen, this month, much discussion […]

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Wondering if the Vaccine Worked? Get the Right Test, at the Right Time

Scientists generally recommend against antibody testing after vaccination. But for some people, it makes sense. By Apoorva Mandavilli Now that tens of millions of Americans are vaccinated against the coronavirus, many are wondering: Do I have enough antibodies to keep me safe? For a vast majority of people, the answer is yes. That hasn’t stopped hordes from stampeding to the […]

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