Bird flu in cows - is it inching closer to humans?

Avian flu is in cows in the US - is it inching closer to humans? The H5N1 strain of avian flu has been around since 1996, but until now its been largely confined to animals. But it has now jumped to cattle in America and some think it means we are inching towards eventual human-to-human infection, with potentially serious consequences. BBC News

... the (spread of the virus between states seems to be down to the movement of infected cows across state lines. ...

Reporting and surveillance of cattle movement in the US is poor compared with the UK and Europe where the BSE outbreaks of the mid-nineties led to all cows having to be tagged.

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