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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Two options are decontaminating N95s or using elastomeric respirators.
One of the studies is the first published randomized controlled trial on the drug for COVID-19.
A major part of Operation Warp Speed will involve ramping up vaccine production.
The World Health Assembly gears up to meet virtually for the first time and will focus mainly on the pandemic.
The US Food and Drug Administration (FDA) says it's working with Abbott Laboratories to address potential false-negative results provided by the company's rapid coronavirus test.
France and Spain learn that relatively few people have been exposed to the virus.
The federal pandemic response has grown increasingly divided and political.
Italian clinicians report 10 cases in about a month, a 30-fold increase.
Two of 15 dogs who shared homes with humans infected with COVID-19 in Hong Kong were also infected, according to a study published today in Nature, and a separate study details experimental infections of cats.
Brazil reports 881 new COVID-19 deaths, its highest daily fatality count.