Sewer sampling, the authors say, could be expanded to track other infectious diseases such as H5N1 avian flu or mpox or to detect unexpected pathogens.
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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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.
Nearly 2.7 million COVID-19 cases were reported to the WHO last week, up 2% from the week before.
The 47 women were given Paxlovid a median of 1 day after COVID-19 symptom onset.
