Clinical Impact of Serious Respiratory Disease in Children Under the Age of 2 Years During the 2021-2022 Bronchiolitis Season in England, Scotland, and Ireland.

Participants with congenital heart disease were more likely to receive higher levels of care than those with no comorbidities ( Supplementary Table 3 ), except for invasive mechanical ventilation, where although there was a high relative risk this did not reach statistical significance.

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