👉 September infection, also known as September virus or influenza-like illness (ILI), is a common respiratory infection that typically occurs in the late summer and early fall, peaking around September in many regions. It is caused by various strains of the influenza virus, though it can also involve other respiratory viruses like rhinoviruses and coronaviruses. Symptoms include fever, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, and fatigue. Unlike the more severe seasonal influenza, September infection often causes milder symptoms and is generally less likely to lead to serious complications. However, it can still be contagious for several weeks after recovery, making it important to practice good hygiene and take preventive measures during this period.