Cause of B.C. teen's H5N1 avian flu infection still unknown, health officials say

B.C.'s top doctor says they still don't know how a teenager became sick with a strain of avian flu. The update comes as another case has been identified in a child in California. As Michelle Ghoussoub reports, officials stress the risk of transmission to humans remains low. Connect with CBC Vancouver online: Website: https://www.cbc.ca/bc TikTok: https://www.tiktok.com/@cbcvancouver #CBCVancouver #CBCNews #BritishColumbia #avianflu #H5N1 #birdflu