The United States has been in a "protracted health crisis" for decades, the researchers say.
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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Among 12- to 17-year-olds, 90% of those with MIS-C were unvaccinated.
Meanwhile, COVID activity remained low amid a shift in variant proportions and RSV levels rose in 3 US regions.
There was a modest increase in parent-reported infant self-regulatory behavior—a generally positive finding—at 6 months.
Over half of participants (57%) reported a history of SARS-CoV-2 infection.
Nasal autoantibodies likely latch on to viral molecules, preventing excessive inflammation.
Overall, the risk of developing 28 out of 36 long-COVID symptoms lessened when vaccines were effective.
The greatest levels of trust were seen among men, those with university degrees and high median outcomes, and those who had lost someone to COVID-19.
Among about 9 million healthcare personnel working in more than 4,000 acute care hospitals, flu vaccine coverage was 81%.
One study found a 25% and 42% higher risk of long COVID among obese and severely obese children, respectively.
A 3-year-old white-tailed doe tested positive for the fatal prion disease on routine postmortem testing.
