Scientists warn Canada 'way behind the virus' as bird flu explodes among U.S. dairy cattle Calls for active surveillance on both sides of the border after H5N1 spreads across 9 states

While federal officials say there’s still no sign of a dangerous form of bird flu appearing in Canadian dairy cows, scientists warn limited surveillance means Canada might not be staying ahead of an explosive H5N1 outbreak impacting dairy cattle south of the border.