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Research suggests why the ‘Alpha’ Coronavirus Variant Became So Powerful

In December, British researchers discovered that a new variant was sweeping through their country. When it arrived in other countries, the variant, now known as Alpha, tended to become more common in its new homes as well. By April, it had become the dominant variant in the United States, and it has remained so ever since.

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China reports human case of H10N3 bird flu, a possible first

BEIJING (AP) — A man in eastern China has contracted what might be the world’s first human case of the H10N3 strain of bird flu, but the risk of large-scale spread is low, the government said Tuesday.

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Immunity to the Coronavirus May Persist for Years, new studies

 

Immunity to the coronavirus lasts at least a year, possibly a lifetime, improving over time especially after vaccination, according to two new studies. The findings may help put to rest lingering fears that protection against the virus will be short-lived.

Together, the studies suggest that most people who have recovered from Covid-19 and who were later immunized will not need boosters. Vaccinated people who were never infected most likely will need the shots, however, as will a minority who were infected but did not produce a robust immune response.

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