The combined vaccine elicited higher immune response against SARS-CoV-2.
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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Symptoms overall declined in a year, but some had symptoms for the first time at 6 and 12 months.
Nocebo is a phenomenon in which people experience negative effects when they have negative views or expectations.
As hospitalizations almost double, most states are experiencing high or very high flu levels.
The study highlights a likely high rate of asymptomatic disease spread.
"It is clear that ... healthcare services and policy need to prioritise long Covid care."
Data reflect about an 11% incidence of residual lung damage known as interstitial lung disease after COVID-19 hospitalization.
Attending classes online was more stressful than in-person or hybrid instruction.
Over half of those who had COVID-19 in 2020 reported persistent long-COVID symptoms and continued use of health services.
COVID-19 infection is tied to increased liver stiffness, a sign of possible long-term liver injury.
Omicron appears to have similar risk of long-COVID symptoms as the Delta variant.