The pathogen of influenza A H1N1~ is the influenza A H1N1 virus. Influenza A H1N1 disease is caused by infection with the influenza A H1N1 virus, which is an RNA virus. Immunocompromised people and the change of seasons can increase the chances of infection by this virus. In addition, influenza A (H1N1) virus is mainly spread through the respiratory tract by droplets, especially in crowds by coughs and sneezes of infected people, and is therefore more likely to be contracted in crowded environments. It can also be spread through contact with contaminated environments. In addition the symptoms of influenza A (H1N1) virus infection are similar to those of a cold and may include fever, cough, fatigue and loss of appetite. In summary, patients are advised to seek timely medical treatment and standardized diagnosis and treatment when necessary.