title: [Frequency of antibodies against parainfluenzal viruses in the Rumanian People's Republic].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000906:Antibodies; D002648:Child; D002675:Child, Preschool; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009976:Orthomyxoviridae Infections / Q000276:immunology*; D018184:Paramyxoviridae Infections / Q000276:immunology; D018108:Respirovirus; D012383:Romania
chemical_list: D000906:Antibodies
vernacular_title: Frecvenţa anticorpilor faţă de virusurile paragripale în R.S.R.