J09-J18: Influenza and pneumonia

J10: Influenza due to identified seasonal influenza virus

Influenza due to identified seasonal influenza virus is a group of conditions that are caused by different strains of influenza viruses that typically circulate during specific times of the year, often referred to as flu seasons. These strains are identified and categorized based on their virus type. The condition is highly contagious and is commonly spread through droplets when an infected person coughs, sneezes, or talks. Typical symptoms include fever, chills, cough, sore throat, runny or stuffy nose, body aches, headache, fatigue, and sometimes nausea or vomiting. In some cases, influenza can lead to serious complications like pneumonia and bronchitis due to damage to the respiratory system. Patients with this condition may experience varying degrees of severity, generally starting with mild symptoms that can progress to more serious ones within a few days.