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Epidemiology

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Longer Estrogen Exposure Tied to Fewer Small‑Vessel Brain Lesions in Older Women

A five-year MRI study links longer reproductive span and hormone use with healthier tiny brain blood vessels without proving causation.

Infant Bleeding Rises as More U.S. Parents Refuse Newborn Vitamin K

Cash Program Halves Neonatal Deaths in Flint, Study Finds

Pediatric E-Bike and E-Scooter Injuries Surge, Study Finds

Preliminary Study Links Cannabis Use to Higher Odds of Stroke and Cardiovascular Disease

Analysis of 25,419 Psychedelic Hotline Calls Finds High Cannabis Distress and Reports of Facilitator Abuse

Boston Study Estimates 74.5% of Deceased NFL Players Had CTE

Large U.S. Study Links Prenatal Wildfire Smoke Exposure to Higher Autism Risk

Two Daily Drinks Linked to a Measurable Lifetime Risk of Alcohol-Related Death

Study Finds Link Between Recreational Cannabis Legalization and Rising Cardiovascular Hospitalizations in Western U.S.

Study Finds Most Infant Household HBV Exposures Come From Nonmaternal Contacts

Third-Trimester Restless Legs Linked to Triple Risk of Perinatal Depression

Study Ties Vaccination Shift to Projected Surge in Chronic Hepatitis B

Study Finds U.S. Teen Girls Now Vape More Than Boys

Abdul El‑Sayed Faces Backlash Over 2011 Study Linking Interethnic Mating to Preterm Birth

Rare Brain‑Infecting Fungus Detections Quadruple in the U.S.

Large Study Finds Abrupt, System‑Wide Physiological Shifts at Menopause

Adult ADHD Linked to Higher Risk of Mild Cognitive Impairment and Dementia

Late‑Night Eating Linked to Higher Risk of Fatty Liver and Cirrhosis

HHS Opens NIH Clinic to Study Reported Vaccine Injuries