Fig. 2

Rates of hospital admission (from 2018 to 2021) due to RSV bronchiolitis according to infants’ age

Z-test was carried out to test the null hypothesis that the proportion of cases in several groups are the same, followed by pairwise Z-test as post-hoc significance testing between pairs with p-values adjusted using the Bonferroni method

*(∆) Significant differences (2019 vs. 2021, p = 0.04) for infants aged 0 to 28 days, *(§) Significant differences (2019 vs. 2021, p = 0.01) for infants aged 91 to 365 days