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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"We now have all the pieces in place for the rapid distribution of vaccines."
About 1.7 million Americans get vaccinated each day, and states receive 11 million doses a week.
The changes could have been due to lower illness incidence, medical care avoidance, or unaddressed care needs.
B117, a SARS-CoV-2 variant believed to have increased infectivity, is linked to high viral loads in COVID-19 patients in the United Kingdom, while a small number of patients with extremely high viral loads could have largely driven the second wave of the pandemic in Houston, according to two new studies in the Journal of Infectious Diseases.
Study authors are testing to verify the strain is not more infectious or faster growing than other strains.
Also, Walgreen's, Rite Aid, CVS, and other pharmacies start distributing COVID-19 vaccines.
An open-label study found the two supplements did not reduce symptom duration in outpatients.
In another encouraging trend, deaths have fallen for the second week in a row.
A single dose of the Pfizer-BioNTech COVID-19 vaccine was immunogenic in 92% of recipients, with no difference in immunogenic response between men and women but a decreasing response among older recipients, researchers from Israel's Bar-Ilan University reported yesterday in Eurosurveillance.
Those fully vaccinated and exposed to a case no longer need a 14-day quarantine.
