two main groups of children at risk from developing bronchopulmonary obstruction during respiratory virus infections were found : 1 ) infants , suffering from bronchiolitis , mainly due to respiratory syncytial virus , and 2 ) children of all ages with bronchial asthma , among whom acute attacks were precipitated by virus infections , mainly rhinovirus and respiratory syncytial virus infections .
C0021270
infants
C0008059
children