Im sure its due to Flu Defence. This fantastic product!

Flu defence is the first 100% natural general-purpose flu remedy that attacks the virus and boosts the immune system, with no known side effects. Now you can easily Prevent flu and support your bodies natural defences during acute symptoms. The fine of herbal extracts in Flu Defence, will not only boost your immune system, but will also neutralize various viruses. Studies show the ingredients in Flu Defense act a powerful immune booster, that exhibits strong antiviral action against influenza A & B, birdflu, herpes, swine flu and even HIV.

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