Older adults have stronger immunity to bird flu

A study from the University of Pennsylvania found that older adults have stronger immunity to the H5N1 bird flu virus due to past exposures to seasonal flu viruses. Those born before 1968 showed higher levels of antibodies that can bind to H5N1. Younger individuals, particularly children, have lower levels of these antibodies. The research suggests that they would benefit more from H5N1 vaccinations, even if the vaccines are not specifically tailored to the current strain. The study also indicated that while older adults had higher antibody levels before vaccination, children showed a significant increase in antibodies after receiving the H5N1 vaccine. This suggests that children may be more vulnerable in the event of an H5N1 pandemic.