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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Pregnant women had an incidence of PASC of 25.5% compared to 33.9% non-pregnant women.
The risk of developing post-acute respiratory conditions was highest in the first 3 months after COVID-19 infection but was still elevated after 6 months.
In 2020 and 2021, COVID-19 was the top cause of death for the region of the Americas.
The FLiRT variants are fueling new COVID-19 waves in some countries, but so far US markers don't show major upticks.
The decline in care quality may have been due to staff shortages, a lack of personal protective equipment, and visitor policies that limited family support, the authors say.
Of the vaccinated patients, 97% had 2 doses of COVID-19 vaccine.
The health ministry said two JN.1 variants, KP.1 and KP.2, make up more than two-thirds of Singapore's COVID cases.
About 55,500 patients were flagged for long COVID, compared with 2.1 million who self-reported the condition in a community infection survey.
Ninety percent of long-COVID patients had pathologic findings.
A total of 76% of patients were prescribed antibiotics.
