A team of scientists has found that the H9N2 bird flu virus, often considered minor due to its limited impact on birds, has adapted to human cells, raising concerns about its potential to spark a human pandemic.
Although cases of person-to-person transmission have not been reported yet, experiments suggest that the virus has become better suited to infect humans.
The researchers say more surveillance of the virus is needed.
The focus has primarily been on the avian influenza virus H5N1 in recent years, but scientists are now expressing concern over the spread of other bird viruses, including H9N2.
Author's summary: H9N2 bird flu strain may cause human pandemic.