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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The report details obstacles for more than 12 million English language learners and special education students.
Racial minorities and other at-risk children appear to have more serious outcomes.
A Dutch study late last week found reduced lung capacity in 42% of COVID-19 patients 3 months after recovery, with many patients reporting severe problems with fatigue, functional impairment, and quality of life (QoL).
Also, Pfizer and BioNTech submitted an EUA request for their vaccine, offering hope it will be available this year.
The findings may explain why COVID-19 spreads quickly and is difficult to contain.
A study yesterday found that 47% of COVID-19 patients who required prolonged mechanical ventilation developed potentially life-threatening tracheal (airway) complications.
Also, US leaders encourage Americans to double down on efforts now that vaccines are on the horizon.
Study shows that 28% of older COVID-19 emergency department patients had delirium, with a higher risk of ICU stay and death.
Experts urged individual actions to avoid protracted lockdowns and maintain hard-fought gains.
Public transportation usage dropped 72.7% across the United States from Feb 15 to May 17, but vulnerable populations and essential or physical workers were most likely to continue using it, according to a study published yesterday in PLOS One.