Difficult question to answer because it is not clear if your children attend a creche where they are sure to be exposed to children with coughs and colds and flu this winter. To absolutely avoid being infected your children should have had the flu shots which included the H1N1 strain before the winter started. Strict hand washing especially before meals and absolute avoidance of contact with anyone with flu-like symptoms is essential to prevent spread of this illness. See a doctor at the first sign of symptoms suggestive of flu such as fever, headache and muscle pains in particular.
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