INFECTION WITH INFLUENZA AND PARAINFLUENZA VIRUSES IN CRONIC BRONCHITIS.
D001991:Bronchitis; D006801:Humans; D007251:Influenza, Human; D009975:Orthomyxoviridae; D009976:Orthomyxoviridae Infections; D018184:Paramyxoviridae Infections
BRONCHITIS; INFLUENZA; INFLUENZA VIRUSES; MYXOVIRUS INFECTIONS; PARA-INFLUENZA VIRUSES