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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Since May 10, the US rate has exceeded that of all other nations studied.
The data offer hope for disease protection, but persistence was not analyzed beyond 4 months.
A trio of studies look at young adults' actions and consequences during the pandemic.
Cases are rising in 28 states, and details on Trump's illness are still murky.
Remdesivir helped patients recover faster, but hydroxychloroquine, again, did not prevent death.
In 2000, Europe imported 31% of drug materials from Asia; the number has now grown to 63%.
Several European nations report new daily highs, and hospital cases are rising in France.
Studies find that women, older people, and the conscientious tended to adhere better.
"Science will guide our decision, and I will not ... allow pressure from anybody to change that."
As Regeneron becomes the second firm to apply for an EUA for an experimental antibody treatment, experts call for approvals to be based on rigorous science.
