The Centers for Disease Control and Prevention (CDC) has identified mutations in a strain of the avian influenza virus H5N1, also known as bird flu, found in a Louisiana patient.The mutations were discovered after samples from the patient were analyzed,

One of the mutations was also seen in a sample from a British Columbia teenager who was hospitalized with bird flu, the CDC said. While the findings show that the virus has the capacity to mutate in ways that could make it more transmissible to humans ...