Omi̇cron

Health

Two new versions of Omicron are gaining ground in the U.S., according to C.D.C. estimates.

The Omicron subvariants known as BA.4 and BA.5 now represent 13 percent of new coronavirus cases in the United States,…

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World

South Africa’s latest surge is a possible preview of the pandemic’s next chapter.

Coronavirus cases are surging again in South Africa, and public health experts are monitoring the situation, eager to know what’s…

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Health

High Death Rate in Hong Kong Shows Importance of Vaccinating the Elderly

The first time the Omicron variant breached Hong Kong’s coronavirus defenses, in late 2021, the city stamped it out, cementing…

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Health

‘Stealth’ Omicron Is Stealthy No More: What’s Known About the BA.2 Variant

As the Omicron coronavirus surge subsides, researchers are keeping an eye on a highly transmissible subvariant known as BA.2. Although…

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Politics

Biden Offers More Free Covid Tests Although Demand Has Slowed

WASHINGTON — The Biden administration on Tuesday formally began allowing Americans who had ordered free coronavirus tests this winter to…

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World

Is the BA.2 version of Omicron worse? Here’s what you need to know.

With the huge Omicron surge in coronavirus cases now receding in the United States and many other countries, reports have…

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Politics

F.D.A. Clears Covid Drug From Eli Lilly That Shows Promise Against Omicron

With Covid treatments still in short supply in the United States, the Food and Drug Administration on Friday gave emergency…

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Health

New York Deer Infected With Omicron, Study Finds

White-tailed deer on Staten Island have been found carrying the highly transmissible Omicron variant of the coronavirus, marking the first…

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World

An Omicron subvariant gains in Europe, but is unlikely to alter the picture very much, experts say.

A subvariant that scientists believe is even more contagious than the most common form of Omicron is spreading rapidly in…

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World

How New York City’s Hospitals Withstood the Omicron Surge

More than 60,000 New York City residents tested positive for the coronavirus in a single day. Testing lines stretched for…

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