What are the symptoms and manifestations of influenza A infection in children?

　　H1N1 refers to influenza A (H1N1). Symptoms and manifestations of influenza A (H1N1) infection in children generally include high fever, cough and nasal congestion, sore throat and pharyngeal inflammation, fatigue and malaise, gastrointestinal issues, among others. Specific details are as follows:

　　1. High fever

　　Influenza A (H1N1) is a viral infection often accompanied by high fever. Children infected with influenza A (H1N1) may develop sudden high fever, usually exceeding 38°C. The high fever may be accompanied by chills and general discomfort.

　　2. Cough and nasal congestion

　　Cough and nasal congestion are common in children with influenza A (H1N1). The cough may be dry or productive with mucus, while nasal congestion may block the nasal passages, causing difficulty breathing and possibly accompanied by runny nose.

　　3. Sore throat and pharyngeal inflammation

　　Influenza A (H1N1) infection often causes sore throat and pharyngeal inflammation. A sore throat may make swallowing difficult for children, while pharyngeal inflammation can lead to redness, pain, or a burning sensation in the throat.

　　4. Fatigue and malaise

　　Symptoms of influenza A (H1N1) in children also include persistent fatigue and general malaise. Children may appear weak and tired, and may lack the energy to carry out daily activities.

　　5. Gastrointestinal problems

　　Influenza A (H1N1) infection may sometimes present with gastrointestinal symptoms such as nausea, vomiting, abdominal pain, and diarrhea. These gastrointestinal issues may be more common in children.

　　These symptoms and manifestations may vary among different children. Prompt medical attention and professional treatment are essential. In daily life, it's important to maintain good personal hygiene habits, avoid exposure to infection sources, and strengthen physical exercise.