Irritation of the mucous membranes of the upper respiratory tract will lead the person to sneeze. The body uses sneezing to get rid of the irritant by forcefully pushing air through the nose and mouth. It is important that you notice that pertussis is very contagious during the first stage of infection. This means that the people affected with pertussis can easily spread the infection to those around them as soon as they start to show symptoms and up to two weeks.
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