So if you have a cold, flu, cough, bronchitis, those are all viral infections and need antivirals.

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Here are five things you can do when you have the flu, and five that are probably a waste of time.

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There are things you can do to minimise some risks such as have a flu jab, stay warm and wash your hands regularly.

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Get a flu shot, even if you have not already.

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For instance, a model that you can only do with supercomputers to have the next generation vaccine to kill avian flu--this is a project we're partnered with E.

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The take-home message is this: Use a surgical mask when you are traveling to areas that have reported cases of swine flu and bring an additional one to give to anyone near you who forgot one or appears to be sick and is coughing or sneezing.

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If you are over the age of 50, are pregnant, have asthma, diabetes, chronic lung disease (such as COPD or emphysema), you should get a flu shot.

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