WASHINGTON - The ongoing spread of bird flu in the US has alarmed experts – not just because of human cases causing severe illness, but also due to troubling new instances of infections in cats.

The ongoing spread of bird flu in the United States has alarmed experts - not just because of human cases causing severe illness, but also due to troubling new instances of infections in cats. A ...

Listen to Story Virus mutations in patient but no spread to others or birds More evidence needed to determine if mutations increase transmissibility Experts warn of risks from infected outdoor cats ...

Rather than intensifying disease, Kuiken pointed out, such adaptations might actually result in milder infections by favoring cells in the upper respiratory tract — causing symptoms like a runny ...