👉 Astarnavirus is a virus that causes respiratory illness in humans and is transmitted through close contact with infected people, especially those who have had close contact with an animal or are at risk of catching it from an infected person. The disease can be severe and life-threatening if not treated promptly. Symptoms include fever, cough, sore throat, fatigue, and difficulty breathing. It is highly contagious and should be treated immediately to prevent the spread of the virus.