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Infection-fighting B cells appear to have a poorer "memory" of the COVID virus in those who've suffered severe COVID-19.
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In the midst of record COVID case numbers in the U.S., biostatistician Natalie Dean walks us through how to assess the metrics.
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The burning questions: What makes this newly identified variant so transmissible? And what does it mean for preventing spread?
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Two studies that have not yet been peer reviewed indicate increased protection against the infectious omicron variant.
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The omicron situation seems to be changing so fast that it's hard to figure out which activities are safe on any given day. Two experts guide us through how to make a smart risk budget.
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Here's how their hospitals are doing nearly two years into the pandemic, what they are seeing in new omicron patients, and their thoughts on the wave of burnout affecting the industry.
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They project a statewide surge in coronavirus cases over the next few weeks will outpace the nation as a whole, in part because of lower vaccination rates.
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Scientists are projecting the surge will peak in January. Just how massive it could be depends on how quickly Americans get boosted and change behavior to slow the spread.
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Data from 78,000 South Africans with COVID show the Pfizer vaccine is far less effective in preventing infection by the omicron variant. But there is still significant protection from severe illness.
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In small studies in South Africa and in Germany, the results indicate a marked decrease in the ability of vaccines to neutralize this variant. But there are other findings that are encouraging.