The 10 new flu-related deaths in children bring the season's total to 226, the most since 2009-10.
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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The attack rate in the outbreak was high, at 87%, though officials said it's too soon to say how the variant will behave in the wider population.
The authors said that giving the two vaccines at a single clinic visit should increase adherence.
During follow-up testing beginning 4 months after infection, study participants with COVID-19 were offered structured, additional heart screenings, including cardiovascular MRI.
In other developments, Danish researchers today reported on the country's first 10 BA.2.86 cases, none of which were severe.
The authors say the results point to immunologic coronavirus imprinting in patients with rheumatic disease and long COVID that may result in incomplete SARS-CoV-2 immunity, control, and clearance.
The risk of both new-onset and recurrent depression was greater in those who reported loneliness, had functional limitations, or experienced escalated family conflict.
Meanwhile, several more BA.2.86 sequences were reported, as Moderna notes reassuring lab findings against BA.2.86 for its updated vaccine.
Though more patients were infected during the Omicron phase of the pandemic, only 0.2% in the Omicron cohort were diagnosed as having long COVID.
Other reasons included concerns about safety and efficacy beyond that of previous doses.
Disruptions to healthcare during the pandemic may have led to missed cancer diagnoses and treatment delays.
