Older adults show better immunity to bird flu

New research from the University of Pennsylvania shows that older adults may have better immunity against the H5N1 bird flu virus due to past exposures to seasonal flu viruses. Those born before 1968 have higher levels of antibodies that can bind to H5N1. The study found that younger individuals, especially children, have lower levels of these protective antibodies. Vaccination with H5N1 vaccines increased antibody levels significantly in children, suggesting they may benefit more from such vaccines. The current H5N1 strain, which has spread among cattle, does not easily infect humans. However, mutations could change this, making it important to monitor and prioritize vaccinations for children in case of a pandemic.