Roughly 1 in 100 adults aged 65 and older with COVID were hospitalized each year of the study period.
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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In contrast, the condition affected less than 1% of the Swedish population before the pandemic.
The rate of test positivity and percentage of emergency department visits diagnosed as COVID-19 significantly declined in September.
The authors call for more research to identify patient groups that could benefit from repeated treatment for COVID-19 after symptom and/or viral RNA rebound.
Prior COVID-19 infection was associated with a 41% increased risk of all-cause dementia.
Less than half, 42%, of the 1,700 respondents, said it was safe to take an mRNA COVID vaccine in pregnancy.
The findings, the authors say, supports the need to reconsider the federal decision to remove vaccine eligibility during pregnancy.
The Vaccine Integrity Project staff and advisors note the conspicuous and consequential absence of US health agency vaccine campaigns and annual vaccination reminders ahead of respiratory virus season.
In-hospital death among nebulized-heparin recipients was 4%, compared with 14% in controls.
In other developments, the CDC reported one more pediatric flu death, raising the season's total to 281, the highest for a nonpandemic year.
Changes in, or loss of, sense of smell can have a profound impact on a person's well-being, the authors say.
