Sparrows mainly carry avian influenza viruses, which are categorized into three subtypes: A, B and C. Influenza A viruses are the most common. The main transmission route of avian influenza is the respiratory tract, through close contact with infected birds, their secretions, excretions and contaminated water sources. Typical clinical manifestations of human infection with avian influenza are flu-like symptoms, pneumonia, etc. Conjunctivitis, intestinal symptoms and neurological symptoms may also be present. Wild sparrows carry more complex viruses and bacteria, if contact with wild sparrows or their secretions, fever, headache, myalgia and other symptoms, you should promptly consult a doctor for examination, not unauthorized treatment, so as not to delay the condition. Pay attention to personal hygiene on weekdays, refuse to eat wild animals, and rationalize your diet to avoid viral and bacterial infections.