Researchers have identified new roles for a protein long known to protect against severe flu infection -- among them, raising the minimum number of viral particles needed to cause sickness.
A Canadian teen who is in critical condition after contracting H5N1 bird flu was infected with a version of the virus that is different from the one circulating in U.S. cattle.
A B.C. teenager who tested positive for bird flu — caused by the H5N1 strain of avian influenza — is now in critical condition and being treated in B.C. Children’s Hospital, the provincial health ...