Currently, there is extensive research on asthma susceptibility genes, confirming associations with genes such as interleukin-4 (IL-4), interleukin-13 (IL-13) (17), β2 adrenergic receptor (ADRB2) (18), Zona Pellucida Binding Protein 2 (ZPBP2) (19), and numerous other candidate genes. This evidence concerns the gene ADRB2 and asthma.