Scientists track babies for years to unlock flu immunity secrets

This study aims to understand how a baby's first encounter with the flu—whether through infection or vaccination—shapes their immune system's response to future flu exposures. Researchers will follow 1,500 mother-infant pairs from late pregnancy until the children are 3-4 years old, monitoring illnesses and immune responses during flu seasons. The goal is to gather detailed information to help improve future flu vaccines, not to test a new treatment.