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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Moderate to severe COVID-19 from the Omicron variant was nearly three times more likely in women who received no vaccines during pregnancy.
A randomized trial found that antibiotics used to treat Heliobacter pylori infections had lower-than-accepted eradication rates in patients previously treated for COVID-19.
Also, separate reports from the WHO and Europe show declines in cases, with countries and regions reflecting differences in subvariant proportions.
All samples from the Heathrow and Bristol airports and 85% from the Edinburgh terminals tested positive for SARS-CoV-2 genetic material.
The most-cited reasons for not getting new COVID-19 boosters were lack of awareness about eligibility and overestimations of their own existing immunity.
The authors say the findings indicate that the protection conferred by previous infection should not detract from the need for vaccination.
Risk factors for persistent symptoms at 28 days included being unvaccinated at infection, moderate or severe acute illness, longer hospital stays, and underlying health conditions.
Within the first 21 days after diagnosis, the risk of all-cause death was 68 to 81 times higher in COVID-19 patients.
Poor outcomes include illness and death, bacterial infections, more ICU days, and serious conditions such as preeclampsia.
The number of affected COVID-19 survivors is based on the estimated global rate of 10% of infected people and more than 651 million documented cases and is likely an undercount.
