Overall, 57% of participants had evidence on PET/MRI of inflammation affecting the heart or lungs.
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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Sixty percent were not ready before the pandemic, the findings revealed.
Among the 76% who said they now experience insomnia, half reported new and frequent episodes of waking up at night.
Along with a rise in blood-related diagnoses, healthy adults experienced rises in endocrine and digestive conditions.
Flu indicators are rising in some parts of the nation, especially the Midwest and South-Central regions.
Overall protection among adults against symptomatic COVID-19 was 54%.
Beta was followed by Gamma, Alpha, Delta, and Omicron, with variant-specific case-fatality rates ranging from 1% to 4%.
At 3 months, Hispanic participants were more likely than non-Hispanic participants to report fair or poor health.
The results highlight the importance of supporting older adults so that their decision whether to have surgery isn't based on financial factors, the authors say.
CDC guidance was based on droplet dogma rather than the current view that SARS-CoV-2 spreads primarily through aerosols, the authors said.
People with rheumatologic autoimmune diseases and HIV had an only slightly elevated mortality risk compared to immunocompetent patients.
