Thepa e reretsoe ho lemoha li-antibodies tsa IgM maling a motho khahlano le likokoana-hloko tse ngata tse bakang mafu a matšoafo.E tobane le Mycoplasma Pneumonia, Chlamydia Pneumonia, Respiratory Syncytial Virus, Adenovirus, le Coxsackievirus Group B.