Potential Human Pandemic from Bird Flu Strain
A bird flu virus, H9N2, has the potential to spark a human pandemic, despite typically causing only minor disease in birds.
Experiments suggest that H9N2 has adapted to human cells, although cases of person-to-person transmission have not been reported yet.
The virus has become better adapted to infect people.
Scientists are concerned about the spread of this and other bird viruses, and recommend increased surveillance of H9N2.
Author's summary: Bird flu strain H9N2 may cause human pandemic.