Etiology: Pertussis is caused by Bordetella Pertussis the bacteria invades the nose and throat and then the trachea followed by the bronchial tubes of the lungs. People usually contract the bacteria by the air when an give person coughs or sneezes. Then world inhale or come in contact with the infected saliva. People who have been immunized in the past may still develop infection but it is usually impermanent or very mild that is another cause of whooping cough. The incuba...If you sack to get a full essay, order it on our website: BestEssayCheap.com
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