In a study conducted in Hong Kong included 20 patients infected with SARS-CoV-1, under non-severe scenario the serum IL-1β level was significantly higher (above 1.3 ng/L considered significant) for 13 days post infection until recovery, whereas it was not observed in IFN-γ level (above 15.6 ng/L considered significant) in same patients while monitored for 18 days, it is possibly because both severe and non-severe patients were included in the same group (33). This evidence concerns the gene IFNG and infection.