Four additional healthcare workers in Missouri who had contact with a hospitalized patient infected with bird flu developed mild respiratory symptoms but the virus was not confirmed in any of them ...

The bird flu situation in the United States has evolved rapidly since April, when news about the virus infecting dairy cows made headlines. Here's what you need to know about the latest developments.

Missouri bird flu patient didn't spread the virus to others, CDC says Even as cases of H5N1 virus among animals and people are rising in the U.S., there's no evidence of human-to-human transmission.

The news eased worries among researchers that the virus, H5N1, had gained the ability to spread more efficiently among people. Still, the number of human cases is rising in the United States.

H5N1 could pick up a gene from a human flu, which is already very transmissible, and then gain the ability to transmit effectively almost overnight. Article content What people are really worried ...

B.C. provincial health officer Dr. Bonnie Henry said the teen infected with H5N1 avian flu remains in critical condition in Children's Hospital.

A microscopic photo of H5N1 Bird Flu virus (gold). [Photo: Centers for Disease Control and Prevention] Of the seven individuals under investigation in Missouri, six are healthcare workers who ...

A Missouri resident has tested positive for bird flu even though there is no evidence the person came into contact with an animal infected with the virus, the Centers for Disease Control and ...

A person in Missouri has been infected with bird flu, the Centers for Disease Control and Prevention said Friday. The adult, who didn't have known contact with poultry or dairy cows, was ...

A patient in Missouri who was hospitalized after an infection with bird flu had the H5N1 strain of the virus, the US Centers for Disease Control and Prevention confirmed Friday.

Bird Flu Found in Sheep: The H5N1 virus was detected in a single sheep in Britain, in what the government described as the first case of its kind reported anywhere in the world.