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Immunology

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Vaccine advisers to the US Centers for Disease Control and Prevention continue to mull over what the future of Covid-19 booster shots might look like -- and they acknowledge that entirely different vaccine formulations could be needed.

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When Delta Air Lines referred to Covid-19 as an "ordinary seasonal virus" after a federal judge struck down the Biden administration's mask mandate for public transportation, they were partly right: there is some evidence that it is seasonal. But it is far from ordinary, and it's still not the same as the flu.

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On Monday, a federal judge in Florida struck down the Biden administration's mask mandate for airplanes, trains and other public transport. Within hours, several major airlines announced that they would no longer be enforcing mask requirements, and mask-wearing is optional.

ANAHEIM, Calif. — Justin Cohen has waited for the gates to the Coachella Valley Music and Arts Festival to reopen for a long time. How long? The 32-year-old West Hollywood dog walker bought his ticket in June 2019 and has held onto it ever since. “I remember when it got postponed in March 2020,” Cohen says. “I said right then, ‘When we can go back to Coachella, it’ll be almost like an ...

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A third shot of the children's dose of Pfizer/BioNTech's Covid-19 vaccine raised Omicron-fighting antibodies by 36 times in kids 5 through 11 years of age, the companies said in a news release Thursday. The companies plan to request emergency use authorization from the US Food and Drug Administration for a booster dose for this age group.

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LOS ANGELES — Coronavirus cases are on the upswing worldwide, prompting some officials to warn that California could see increases this spring because of the omicron subvariant BA.2 even though cases so far have been modest. The World Health Organization has recorded the first week-over-week increase in global coronavirus cases since late January, with cases rising 8% compared with the ...

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To many parents' dismay, a new report from the US Centers for Disease Control and Prevention found that the Covid-19 vaccine is less effective against the Omicron variant for children ages 5 to 11 than for older children and adults. Two doses of the Pfizer/BioNTech vaccine reduced the risk of Omicron infection by 31% among children 5 to 11 years old, compared with 59% among those 12 to 15.

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