How to perceive tha sars

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In my opinion, we should have a right attitude towards sars.Keeping a good mood is very important! According to reasearch, a piece of relax once a day can promote your immune system which is resistent to sars.But if one are understress all the time, he will be not only easy to get sick,but also may get depression which is a pschological disease.This does not mean that we need not to be concerned about sars. Something to be done should be done. What do you think?