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Roche drug gets WHO backing

The World Health Organisation (WHO) is to start distributing a further batch of 5.65m courses of the antiviral drug Tamiflu from Swiss drug maker Roche Holding.  Earlier WHO director general Dr Margaret Chan said it was  raising its pandemic alert to phase 6, the top of its six-point scale, because of the outbreak of  swine flu (H1N1) , which can be treated by Tamiflu.