Still, it's too soon to draw any conclusions, said Nancy Cox, director of the CDC's influenza division.

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"The H7N9 situation is evolving very quickly, " said Nancy Cox, director of the Influenza Division at the U.S. Centers for Disease Control and Prevention.

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The new virus has genes from North American swine influenza, avian influenza, human influenza and a form of swine influenza normally found in Asia and Europe, said Nancy Cox, chief of the CDC's Influenza Division.

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Mowbray has also watched Swindon forward Simon Cox in action and is keen to keep on-loan Nancy striker Marc Antoine-Fortune at the Hawthorns.

BBC: Griffiths waits on West Brom move