to better understand the recovery process of infants with lower respiratory tract disease due to respiratory syncytial virus , the production of interferon by 129 children ( ages 10 days to 24 months ) with rsv infection was compared to that of 20 children with influenza ( ages 1 to 36 months ) , and 37 children with parainfluenza virus infection ( ages 4 to 66 months ) .
C0042769
disease due to
C0021400
influenza