This finding indicates that the higher risk of severe RSV bronchiolitis (odds ratio (OR), 2.24; confidence interval (CI), 0.98–5.14) [97,98] among individuals with Fokl VDR gene polymorphism (rs2228570; cytosine>thymine (C > T)) is likely related to secondary immunopathology rather than proliferation of the virus itself. Here, VDR is linked to respiratory syncytial virus bronchiolitis.