As bird flu cases continue to pop up in humans, Canada announced Wednesday that it purchased 500,000 doses of vaccine targeted at the virus. Here’s what you need to know about bird flu vaccinations in the U.

Avian influenza is continuing to plague poultry and dairy farming operations, and with the virus spreading across the country with no sign of stopping, some infectious disease experts in the Lehigh Valley say they are looking out for bird flu in the community.