Why humans don't easily catch bird flu

时间:2019-03-02 02:09:01166网络整理admin

BIRD flu can be fatal in humans, but it is also quite hard to catch – and the reason for both lies deep in our lungs. Bird flu infects birds, and human flu infects humans, when the virus binds to a sugar molecule on the surface of the host’s cells – a different sugar for the two kinds of viruses. This week Yoshihiro Kawaoka and colleagues at the University of Wisconsin-Madison report that while cells in our noses, throats and lungs have only the sugar that matches human flu, we also have the “bird” sugar on cells in the alveoli,