Michaeleen Doucleff - NPR

A person in a mask.

What we know about the symptoms — and the severity — of the omicron variant

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Researchers are looking at data from U.S. cases to determine if the variant causes milder disease. Even if the answer is yes, they say, rates of hospitalization could be high during the surge.
A person gets tested for COVID outside.

These numbers show just how impactful the latest COVID-19 surge is

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COVID-19 cases are up across the country, fueled in large part by the highly contagious omicron variant.
A microscopic image shows a big orange circle with small blue circles around it.

A tantalizing clue to why omicron is spreading so quickly

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A new study from the University of Hong Kong offers preliminary information that could explain why this new coronavirus variant may be more transmissible.

Why some researchers think the omicron variant could be the most infectious one yet

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So far, scientists have limited information about omicron. But several red flags suggest that this strain of coronavirus could quickly cause surges in many parts of the world and could be the most contagious one known.
An image of germs and an hourglass.

Coronavirus FAQ: What is long COVID? And what is my risk of getting it?

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One of the surprising aspects of the pandemic is that symptoms can linger months after infection. This syndrome has been called "long COVID," and it's had a profound impact on many people's lives.
A cartoon drawing of a persons head looking at germs with clocks on them.

COVID’s endgame: Scientists have a clue about where SARS-CoV-2 is headed

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Pandemic predictions have been made — and then things would change. But based on models and studies (including a 1980s test that squirted virus up human noses), researchers have a new endgame thesis.

For people who got the J&J vaccine, some doctors are advising boosters ASAP

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The Johnson & Johnson booster is a big issue because people who received that vaccine may need a booster more urgently than those who received the Pfizer or Moderna, according to some experts.
An illustration of antibodies attacking a coronavirus particle.

New studies find evidence of ‘superhuman’ immunity to COVID-19 in some individuals

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That's how some scientists describe the findings of a series of studies looking at the antibodies created by individuals who were infected by the coronavirus and then had an mRNA vaccine.

Immunity to COVID-19 could last longer than you’d think

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So, how long does immunity last after two doses of the vaccine? Six months or so? And at that point, how much protection is left over?