The 10 new flu-related deaths in children bring the season's total to 226, the most since 2009-10.
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 second study showed that COVID-19 survivors had higher rates of most studied symptoms than controls, with the greatest risks for shortness of breath, fatigue, memory loss, and headache.
Among critically ill patients, survival to hospital discharge was 62% for the vitamin C group and 65% for the control group.
The effect was especially pronounced in those given convalescent plasma within the first 48 hours of mechanical ventilation.
The study was based on outcomes seen among 660,000 UK patients from February 2020 to April 2021.
Risk factors for long or very long COVID included female sex, the presence of least one underlying condition, and moderate or severe COVID-19.
Maternal vaccination during pregnancy was not associated with neonatal hospital readmission or 6-month hospital readmission.
Patient blood samples showed signs of persistent immune-system changes believed to be related to long COVID.
During the study period, COVID-19 vaccines were available for use in adults but not children under the age of 5.
The effect was smaller among females, Asian, Black, and Hispanic race, and patients with lower incomes.
The official report said the farm houses 70,000 animals.
