Criteria | |
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1 | The patient’s illness becomes severe, and the severity meets one of the following criteria: (i) persistent high fever for >3 days (≥39°C); (ii) Severe cough, purulent sputum, bloody sputum, or pectoralgia; (iii) rapid breathing, trouble in breathing, lip cyanosis; (iv) alternation of consciousness (that is, drowsiness, restlessness, convulsions); (v) severe vomiting, diarrhea, dehydration; (vi) imaging confirms signs of pneumonia; (vii) levels of myocardial enzymes, such as creatine kinase (CK), creatine kinase isoenzyme (CK-MB) elevate rapidly; (viii) underlying diseases are exacerbated significantly. |
2 | Death (including deaths due to influenza and other causes of death) |
3 | Antibiotic treatment is required (bacterial pneumonia, tympanitis, nasosinusitis secondary to influenza) |
4 | Serious events occur |
5 | Other health reasons |