Older Adults May Have Greater Immunity to H5N1 Avian Flu Virus

Research conducted at the Perelman School of Medicine at the University of Pennsylvania suggests that older adults may exhibit stronger immune responses to the H5N1 avian influenza virus compared to children. The study found that prior exposure to specific seasonal influenza viruses, particularly those circulating before 1968, is associated with the presence of antibodies capable of binding to the H5N1 virus.

The findings highlight a potential link between historical flu exposures and cross-reactive immunity against avian flu strains. Researchers observed that individuals exposed to earlier seasonal flu viruses were more likely to develop antibodies targeting H5N1. This contrasts with younger populations who lack similar antibody profiles due to their limited exposure to these older strains. The study provides insight into how past viral encounters may influence susceptibility across different age groups when faced with emerging influenza threats.

Date: March, 2025

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Author

Mark Chiang