causes of h1n1 by jayanthi

Influenza complications usually arise from bacterial infections of the lower respiratory tract. Signs of a secondary respiratory infection often appear just as the victim seems to be recovering. These signs include high fever, intense chills, chest pains associated with breathing, and a productive cough with thick yellowish green sputum. If these symptoms appear, medical treatment is necessary. Other secondary infections, such as sinus or ear infections, may also require medical intervention. Heart and lung problems, and other chronic diseases, can be aggravated by influenza, which is a particular concern with elderly patients.
With children and teenagers, it is advisable to be alert for symptoms of Reye's syndrome, a rare but serious complication. Symptoms of Reye's syndrome are nausea and vomiting, and more seriously, such neurological problems as confusion or delirium. The syndrome has been associated with the use of aspirin to relieve flu symptoms.