The National Institutes of Health (NIH) is offering a federal grant opportunity titled "Impact of Initial Influenza Exposure on Immunity in Infants," aimed at advancing research on how influenza infections and vaccinations affect infant and childhood immunity. The initiative seeks to establish and characterize longitudinal cohorts of infants and mother-infant dyads to investigate the influence of initial exposure to influenza antigens on immune responses to subsequent infections and vaccinations. This research is critical for developing durable and broadly protective influenza vaccines. The estimated total program funding is $10 million, with three awards expected, and interested applicants can reach out to Dr. Michelle M. Arnold at michelle.arnold@nih.gov or by phone at 301-761-7324. Key deadlines include an estimated synopsis close date of February 11, 2026, and an estimated award date of December 1, 2026.