Preschool-aged children were more likely to have a dry cough and daytime tiredness or low energy.
Plaque growth can lead to a higher risk of heart attack, stroke, and other life-threatening cardiovascular events for as long as 1 year.
Post-exertional malaise, or exercise intolerance, was seen in 36% of those with long COVID.
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As hospital bed occupancy nears record levels, a quarter of US hospitals report critical staffing shortages.
The vaccine was 91% protective against MIS-C, a rare inflammatory disorder.
T cells induced by infection with coronaviruses such as those that cause the common cold might help protect against COVID-19, finds a small UK study today in Nature Communications.
Only 15% of younger children are vaccinated, compared with more than half of adolescents.
In another study, researchers found a third vaccine dose boosts immune response in cancer patients.
Countries took new steps to slow the spread, and new UK data show boosters provide strong protection against severe Omicron infection.
Despite anecdotal reports of alternations in menstrual cycle following COVID-19 vaccination, a study looking at the connection found little impact. A research team based at Oregon Health & Science University published their findings this week in Obstetrics & Gynecology.
Authors include some members of Biden's COVID-19 transition team, who push for a long-term approach.
A study by Italian researchers found only 42% of COVID patients had impaired sense of taste 7 months after infection.
Cases are up in all world regions, especially the Americas and Southeast Asia, leading to the pandemic's highest daily totals.