Overall vaccine effectiveness was 29% against COVID-19–associated hospitalization.
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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People unvaccinated against COVID-19 were at up to four times the risk of infection, finds a JAMA Network Open study based on tests taken at US retail pharmacies, most of them after the emergence of the Delta (B1617.2) variant.
Biden has instructed the government to distribute 500 million free at-home tests.
The authors say use of poorer data is understandable early in a pandemic, but standards should be raised later.
WHO director says there's no doubt socializing over the holidays will lead to more cases, overwhelmed healthcare systems, and deaths.
A study of 107 French teens hospitalized with the COVID-19–related multisystem inflammatory syndrome in children (MIS-C) shows that none had been fully vaccinated against SARS-CoV-2, and only 7 had received one dose.
A study of 685 pediatric patients finds that 10% had severe gastrointestinal involvement.
Other European nations battling Omicron consider taking tougher physical distancing measures.
The variant is in at least 45 states and is causing a surge in the Northeast, including in New York City.
A small observational study presented over the weekend at the online Euroanaesthesia conference suggests that, of COVID-19 patients admitted to the intensive care unit (ICU), those with acute kidney injury (AKI) are more likely to die in the hospital than those with a history of kidney disease.
New UK estimations cast doubt on whether Omicron cases are less severe than Delta variant infections.
