Why a teenager's bird-flu infection is leaving scientists concerned
India TodayA teenager in Vancouver, Canada, is in critical condition after contracting an H5N1 avian influenza virus, raising concerns among researchers about the virus's potential to adapt to humans. Genome sequencing suggests that the virus has mutations that might enhance its ability to infect human airway cells, sparking fears about its evolution, according to a report in Nature. The virus shares similarities with strains circulating in poultry and waterfowl but carries three critical mutations: two that could help it infect human cells and one that might aid replication in human hosts. Researchers believe these mutations may have evolved within the infected teenager, as the virus initially caused an eye infection that progressed to severe lung infection.