O le pusa e faʻamoemoe mo le suʻesuʻeina o le IgM antibodies i faʻamaʻi tetele e iva o faʻamaʻi pipisi o le manava i le toto o le tagata poʻo le plasma.O fa'ama'i e mafai ona iloa e aofia ai: Mycoplasma Pneumonia, Chlamydia Pneumonia, Influenza A, Influenza B, Parainfluenza Virus Type 1, 2 ma 3, Respiratory Syncytial Virus, Adenovirus, Coxsackievirus Group B ma Legionella Pneumophila Serum Type 1.