This Week in Pediatrics
Measles Cases and Outbreaks | Measles (Rubeola) | CDC
There have been 32 new outbreaks** reported in 2026, and 93% of confirmed cases (2,082 of 2,231) are outbreak-associated (717 from outbreaks starting in 2026 and 1,365 from outbreaks that started in 2025).
Paxlovid safe for children age 6 and up, new data reveal | CIDRAP
A study finds that the antiviral drug is safe to prescribe in children with COVID-19 who are at least 6 years old.
Drowning Is the Leading Cause of Death in Children Under 5, and the Deadliest Weeks of the Year Are Beginning
The American Academy of Pediatrics updated its drowning prevention guidelines in May 2026, reaffirming the evidence base for specific structural interventions.
Research of the Day
Early Antibiotic Exposure and Neurodevelopmental Outcomes: A Population-Based Cohort Study
This large population-based cohort study examined over 1.2 million children to investigate the association between antibiotic exposure in the first year of life and subsequent neurodevelopmental outcomes. The researchers found a modest but statistically significant association between early broad-spectrum antibiotic use and increased risk of ADHD and autism spectrum disorder diagnoses, though the absolute risk increase remained small.
Key findings include: (1) Children exposed to antibiotics in the first year had a 12% increased relative risk of ADHD diagnosis; (2) The association was stronger with repeated courses of broad-spectrum antibiotics; (3) The effect persisted after adjusting for maternal infections and other confounders.
While the study shows an association, causation is not established. The findings support judicious antibiotic use in infants—prescribing when clinically indicated, but avoiding unnecessary courses.
Popular Beliefs
Letting babies walk early causes bowlegs
What the evidence shows: There is no evidence that early walking causes bowlegs. Most infants have some degree of bowing that typically resolves by age 3-4. Pathologic bowing has other causes (Blount disease, rickets). Encourage normal motor development and monitor for asymmetric or progressive bowing.
Reading to babies is pointless—they don't understand
What the evidence shows: Research consistently demonstrates that reading to infants from birth supports language development, vocabulary acquisition, and later literacy skills. Even before understanding words, babies benefit from hearing language patterns, rhythm, and the bonding experience. The AAP recommends reading aloud beginning in infancy.
Shaving makes hair grow back thicker and darker
What the evidence shows: Shaving removes hair at the skin surface, leaving a blunt tip that may feel coarser as it grows out. However, it does not affect hair thickness, color, or growth rate. This is an optical illusion from the blunt vs. tapered hair shaft.
Behaviors
Screen Time and Executive Function in Preschoolers: A Longitudinal Analysis
This prospective cohort study followed 850 children from ages 2 to 5 years, examining the relationship between screen time exposure and executive function development. Researchers used validated parent-report measures and direct assessments of working memory, inhibitory control, and cognitive flexibility.
Children with more than 2 hours of daily screen time at age 2 showed lower scores on executive function measures at age 5. Notably, the type of screen content mattered—educational programming showed smaller associations than passive entertainment viewing. Joint parent-child viewing partially mitigated negative effects.
These findings support counseling families on the AAP recommendation of less than 1 hour per day of high-quality programming for children 2-5 years. Emphasize co-viewing and educational content when screens are used. Executive function is crucial for school readiness and later academic success.
Genetics
Genetic Risk Screening for Type 1 Diabetes: Prevention Trial Update
Large-scale genetic screening of newborns identifies high-risk children for T1D prevention trials. Early results suggest immune modulation in high-risk children may delay or prevent onset of diabetes.
Key findings: (1) 5% of screened infants fall into high-risk category; (2) Early intervention delayed onset by average 3 years; (3) Screening acceptable to most families when explained appropriately.
T1D prevention is moving from research to clinical reality. Stay updated on trial availability. For families with T1D history, genetic counseling and risk assessment may be appropriate for siblings.