Cases of H5N1 bird flu in U.S. dairy and poultry workers have largely been mild. However, a new case in a British Columbia teenager has experts worried.

A Canadian teenager is hospitalized in critical condition with suspected bird flu, health officials reported Tuesday.

Pfizer and Moderna are hustling to develop an mRNA bird flu vaccine, the same technology used in the companies' respective COVID-19 vaccines.

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.

It's not clear how the British Columbia teenager picked up the virus, which has been detected recently in wild birds and poultry in the province, a health official said.

A Canadian teen is severely ill with what is believed to be bird flu. The teen is not known to have had any contact with infected animals.

A teenager in British Columbia, Canada has been hospitalized with a presumed case of H5N1 bird flu, the first detected human case in the country in the current outbreak.

Amid an ongoing outbreak of bird flu in American dairy herds and poultry flocks, Canadian officials have announced

H5N1 avian influenza, more commonly known as bird flu, has infected more than 100 million birds in the U.S. and almost 500 dairy cattle herds across 15 states. The virus has popped up in mammals including elephant seals,