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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Also, two states with relatively high vaccination rates are seeing COVID-19 surges.
The authors say factors could include high patient numbers and underestimating airborne transmission.
Japan and Thailand report record daily cases, and South Korea says its fourth surge hasn't peaked yet.
COVID-19 transmission among households was three times more likely if the household had a high living density, according to a study yesterday in Clinical Infectious Diseases. Higher living density is defined as having more than three household members but fewer than six rooms.
Data indicated a third dose was safe and had efficacy in the immunosuppressed.
Also, two states make up 30% of COVID hospitalizations, and third doses for immunocompromised people are likely.
The next study phase includes examining raw data and stored blood samples.
Moderna's COVID-19 vaccine was safe in adolescents 12 to 17 years old, with a similar immune response to that in young adults, according to results of an ongoing phase 2-3 trial published in the New England Journal of Medicine yesterday.
The results help support the CDC's recommendation to vaccinate pregnant women.
Also, the CDC recommends vaccination for pregnant women, as hospitals are stretched to their limits in COVID-19 hot spots.