aetiology: Pertussis is caused by Bordetella Pertussis the bacteria invades the nose and pharynx and then the trachea followed by the bronchial tubes of the lungs. People usually contract the bacteria by the air when an septic person coughs or sneezes. Then creation inhale or arrest in contact with the infected saliva. People who have been protect in the past may still develop infection but it is usually guerilla or very tame that is another cause of whooping cough. The incuba...If you wrong to get a honest essay, order it on our website: Ordercustompaper.com
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