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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For the first time, the recommendations factor in cost-effectiveness for vaccinating those at lower risk, partly due to concerns about maintaining coverage of crucial routine vaccines such as measles.
Recently approved for emergency use, the first combo at-home test for COVID-19 also marks the first self-test for flu.
The latest evidence suggests clinical expertise, rather than a fixed time interval, should guide decisions on proceeding with surgery in recovered COVID patients.
The most common symptoms on day 10 were shortness of breath (38.7%), cough (31.8%), insomnia (31.5%), and fatigue (29.3%).
Using several public datapoints, the group looked for trends including any that might signal tradeoffs between COVID burden and economic and educational outcomes.
Survey results also revealed that women who had been sick with COVID were more likely to report heavy bleeding, missed periods, and spotting.
Frequent staff testing had the biggest impact in the prevaccine months, but still made a difference through the Omicron wave.
Improving uptake of the drug, a component of Paxlovid, could help reduce longer term outcomes, as well as severe disease, the authors said.
Underlying medical conditions significantly associated with long COVID were anxiety and/or depression, asthma, chronic obstructive pulmonary disease, diabetes, suppressed immune system, and ischemic heart disease.
COVID activity is on the rise in the WHO's Eastern Mediterranean and European regions, as well the South East Asia region where infections are up sharply in India.