1. When examining the age distribution carefully, we find particularly in the season 1994-5, in which all children were infected with subtype A, significantly more children < 2 months of age were admitted with RSV than in the two preceding epidemics. The mean Pco2 of these children is higher than the mean of children > 2 months. This influences the mean Pco2 for subtype A in the whole period covering the three separate RSV seasons. The hypothesis was tested using linear regression analysis. The analysis showed a significant relationship between young age
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