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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COVID-19 vaccination does not increase the risk of miscarriage during the first trimester of pregnancy, according to a Norwegian case-control study that involved 13,956 women, 5.5% of whom were vaccinated against the virus. The results were published yesterday as a letter to the editor in the New England Journal of Medicine.
Two large studies show very high protection against the more transmissible variant.
Studies look at COVID-19 immune responses in pregnant women.
For the third week in a row, illness numbers in Europe rose, with a 7% jump last week.
Officials are preparing to vaccinate up to 28 million US children aged 5 to 11 as soon as approval is granted.
COVID-19 outpatients were more likely to have more respiratory symptoms if they were overweight or obese, according to a study published yesterday in Influenza and Other Respiratory Viruses.
The FDA may approve "mix and match" boosters, meaning different ones from the vaccine originally received.
"Learnings from negative trials such as this are important."
France-based Valneva reports positive results for its vaccine compared with the AstraZeneca vaccine.
COVID-19 patients with immune-mediated inflammatory diseases (IMIDs) may benefit from tumor necrosis factor (TNF) inhibitors, according to a study published yesterday in JAMA Network Open.
