Guidelines recommend children maintain a healthy body mass index (BMI) and do physical activity. No population-based estimates exist for elevated BMI or insufficient physical activity among children with congenital heart conditions (CHC). We estimated the national prevalence of elevated BMI and insufficient physical activity among children with and without CHC. We analyzed cross-sectional, nationally representative data on 57,080 children aged 6-17 years from the National Survey of Children's Health, 2021-2022. Among children with (N = 1135) and without (N = 55,945) CHC, we estimated prevalence and 95% confidence intervals (CI) for caregiver-reported elevated BMI (≥ 85th percentile for sex and age) and insufficient physical activity (< 60 min of physical activity < 7 days/week). Using multivariable Cox proportional hazards models adjusted for age, sex, ethnicity/race, federal poverty level, and caregiver education, we approximated adjusted prevalence ratios (aPR) and CI for each outcome by CHC status and, separately, by demographics among children with CHC. Children with CHC had a similar prevalence of elevated BMI (31.5%, aPR = 0.97, CI 0.82-1.14) and a slightly higher prevalence of insufficient physical activity (84.0%, aPR = 1.05, CI 1.00-1.09) compared to children without CHC. Among children with CHC, elevated BMI was 1.5-1.6 times higher for Hispanic compared to non-Hispanic White children, those with lower compared to higher household incomes, and those with caregivers with ≤ high school compared to ≥ college education; there were no demographic differences in insufficient physical activity. Pediatricians and cardiologists can support patients with CHC in meeting BMI and physical activity recommendations to improve their long-term cardiovascular outcomes.

Since April 2024, sporadic infections with highly pathogenic avian influenza (HPAI) A(H5) viruses have been detected among dairy farm workers in the United States. To date, infections have mostly been detected through worker monitoring, and have been mild despite the possibility of more severe illness. During June-August 2024, CDC collaborated with the Michigan Department of Health and Human Services and the Colorado Department of Public Health and Environment to implement cross-sectional serologic surveys to ascertain the prevalence of recent infection with HPAI A(H5) virus among dairy workers. In both states, a convenience sample of persons who work in dairies was interviewed, and blood specimens were collected. Among 115 persons, eight (7%; 95% CI = 3.6%-13.1%) had serologic evidence of recent infection with A(H5) virus; all reported milking cows or cleaning the milking parlor. Among persons with serologic evidence of infection, four recalled being ill around the time cows were ill; symptoms began before or within a few days of A(H5) virus detections among cows. This finding supports the need to identify and implement strategies to prevent transmission among dairy cattle to reduce worker exposures and for education and outreach to dairy workers concerning prevention, symptoms, and where to seek medical care if the workers develop symptoms. Timely identification of infected herds can support rapid initiation of monitoring, testing, and treatment for human illness, including mild illness, among exposed dairy workers.