Whether to administer intravenous fluids for influenza should be decided based on the severity of the illness, individual constitution, and the duration of the disease. It cannot be determined by the simplicity of the condition alone. Influenza is a contagious respiratory disease caused by infection with influenza or parainfluenza virus. If the immune function is normal and there are no complications, generally one can recover on their own in five to ten days without the need for intravenous fluids. However, if influenza infects a person with a weak constitution and causes complications leading to bacterial infection, resulting in symptoms like breathing difficulties and coughing, intravenous fluid therapy is required.