title: Filter paper disc method of collecting whole blood for serologic studies in children.
mesh_terms: D001800:Blood Specimen Collection; D002648:Child; D002675:Child, Preschool; D003168:Complement Fixation Tests; D005374:Filtration; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D066298:In Vitro Techniques; D009174:Mycoplasma; D010209:Paper; D012136:Respiratory Syncytial Viruses; D012141:Respiratory Tract Infections / Q000175:diagnosis*; D018108:Respirovirus