94 French farms struck by new 'Schmallenberg' virus

Ninety-four farms in northern France have been hit by a novel virus, first uncovered in Germany last year, that strikes cattle, sheep and goats, a French research agency reported on Tuesday.

Why do some influenza virus subtypes die out?

Every so often we hear about a new strain of influenza virus which has appeared and in some cases may sweep across the globe in a pandemic, much as the H1N1 virus did last year. What happens to the old seasonal viruses? In ...

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