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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While welcoming the move, African leaders pushed for multiple ways to boost vaccine access, including easing export bans.
Of the cancer patients, 62% reached the highest possible antibody levels.
Hospitalized COVID-19 patients were more likely to have autoantibodies, or self-attacking antibodies, than those without COVID-19, according to a study today in Nature Communications.
Americans are evenly split on requiring proof of vaccination for everyday activities.
Any gain "will not outweigh the benefits of providing initial protection to the unvaccinated," one expert says.
Researchers suggest low staff vaccination rate may have affected the outbreak.
US counties with more excess deaths not attributed to COVID-19 had less health insurance coverage and primary care as well as more at-home deaths, according to a research letter today in JAMA Network Open.
The researchers looked at 2020 data from the US National Center for Health Statistics for 2,096 counties with 319.1 million residents and divided county characteristics into quartiles.
In the Delta era, unvaccinated people have 10 times the risk of severe COVID-19 than vaccinated people do.
More than 68,000 US cases and 16,000 deaths may have gone uncounted.
In the coming months, two thirds of the US workforce will be mandated to get vaccinated.
