The H5N1 virus that infected a Canadian teen appears not to have spread, but it shows signs of mutation that makes flu virologists nervous.

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access information on a device and to provide personalised ads and content, ad and content measurement, audience insights and product development. List of Partners (vendors)

British Columbia health officials have yet to identify a likely source of the infection, though none of the teen's contacts have tested positive for the virus so far.

A Canadian teenager infected with bird flu — that country’s first case involving a locally acquired infection — is in critical condition and experiencing difficulty breathing, health officials said Tuesday.

Remember the H1N1 swine flu pandemic of 2009? Well, H5N1 bird flu could be next - H5N1 bird flu has infected more than 50 people across seven states, with cases steadily climbing

Ducks and geese on a backyard farm in Oahu, the state's main island, tested positive for H5N1 last week, which was likely brought to the island by migratory birds.