Levels of RSV also remain high in many areas of the US, while COVID-19 activity is waning in most of the country.
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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Adults living with HIV are 29% more likely to have long-term COVID symptoms, study suggests.
So far this season, the CDC estimates that there have been at least 24 million flu-related illnesses, 310,000 hospitalizations, and 20,000 deaths.
Adults with long COVID had an 86% higher risk of depression and a 60% higher risk of anxiety.
Full vaccination and a booster dose reduced the risk of preeclampsia by 15% and 33%, respectively, the authors estimate.
Children with the condition are also more likely to have severe infections, the study suggests.
Positive samples were significantly more common in the emergency department than in intensive care.
Hospitalized and non-hospitalized COVID patients were 41% and 33%, respectively, more likely to be diagnosed as having apnea than uninfected controls.
Elevated risk was not seen among people who were partially or fully vaccinated.
Flu, respiratory syncytial virus, and COVID-19 levels still elevated in some parts of the country.
Conversely, anxiety and depression were seen less frequently.
