Cov khoom siv no yog npaj rau kev kuaj pom zoo ntawm IgM cov tshuaj tiv thaiv rau cuaj tus kab mob loj ntawm cov kab mob ua pa hauv tib neeg cov ntshav lossis ntshav.Cov kab mob kuaj tau muaj xws li: Mycoplasma Pneumonia, Chlamydia Pneumonia, Influenza A, Influenza B, Parainfluenza Virus Type 1, 2 thiab 3, Respiratory Syncytial Virus, Adenovirus, Coxsackievirus Group B thiab Legionella Pneumophila Serum Type.