The risk of long COVID was two to three times higher after the initial infection (14.8%) than after first (5.8%) or second (5.3%) reinfections.
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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A study in JAMA Internal Medicine today demonstrates a sharp decline in US hospital COVID-19 mortality rates during the first 6 months of the pandemic, with wide variation across hospitals and poorer outcomes linked to higher county-level case rates.
More than 1,100 cases involving the fast-spreading strain are confirmed, most in people younger than 60.
Today and tomorrow 5.9 million doses of Moderna's vaccine will arrive at 3,400 locations.
A study of pandemic deaths in California in JAMA Internal Medicine today found the highest excess mortality in older adults, black and Hispanic residents, and those without college degrees. Excess death rates for Hispanic residents and those without a high school degree more than tripled after reopening, likely due to increased COVID-19 risk faced by low-wage, essential workers.
Essential workers include first responders, teachers, public transit employees, and grocery store staff.
The company says it began a trial among adolescents; results are expected in 2021.
The US becomes the first nation to have 2 authorized COVID-19 vaccines with clear, compelling efficacy data.
Vaccine distribution to states is hitting some unexpected snags, as the surge ahead of Christmas accelerates, putting record numbers of Americans in the hospital.
Though the studies don't settle questions about the 2 antibody treatments, they shed light on potential clinical benefits.
COVID activity remains intense in Europe, and South Africa is probing a new SARS-CoV-2 variant.
