Compared with other viruses, RSV is associated with more severe symptoms of bronchiolitis, whereas rhinovirus is more commonly associated with post‐bronchiolitis asthma than is RSV.45 In the present study, TLR5 rs5744174 genotypes did not associate with severity markers of bronchiolitis during hospitalization, although non‐RSV bronchiolitis was more common among children with variant genotypes of the TLR5 rs5744174 gene. This evidence concerns the gene TLR5 and asthma.