First of all, influenza A has no fever on the first few days of the most serious statement, suggesting that influenza A is a serious indicator of persistent high fever greater than 3 days, accompanied by severe cough, coughing up purulent sputum, hemoptysis, chest pain and other symptoms. Influenza A suggests that the serious performance are: ① persistent high fever > 3 days, accompanied by severe cough, coughing up purulent sputum, bloody sputum, or chest pain; ② fast respiratory rate, respiratory distress, cyanosis of the lips; ③ changes in mentality: unresponsive, lethargy, agitation, convulsions, etc.; ④ severe vomiting, diarrhea, dehydration; ⑤ combined with pneumonia; ⑥ the original underlying disease significantly aggravated, and so on. Influenza A is mostly common, without complications, the course of the disease is self-limiting, clinical manifestations of fever, headache, myalgia and general malaise and other symptoms, there may be chills, fatigue, etc., mostly in the onset of 3-4 days after the gradual subsidence of the body temperature, systemic symptoms improve. Influenza A patients are recommended to actively seek standardized treatment to avoid delay.
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