Antibodies to Myxovirus Parainfluenza-3 Virus in Human Sera in Iran
199 human serum samples were examined for the presence of Myxovirus Parainfluenza 3 (MPI 3)haemagglutination inhibition (HI) antibodies. or tbe total male sera, 75% and female 70.52% had HI antibody titers of t:32 or greater. The percentage of positive samples increased according to the age grouping of the human beings. These results indicate that MPI 3 virus infection is widespread among the human population in Iran. and it may be considered as one of the causes of respiratory illnesses in children and adults.