However, in the viral hepatitis group, this protective effect of the rs2241715 C allele on language function was not observed, aligning with the aforementioned study and suggesting that the TGFB1 SNP influences TGFβ1 levels in a specific manner: conferring a protective effect in individuals without viral hepatitis, an effect not observed in those with viral hepatitis. The gene discussed is TGFB1; the disease is animal viral hepatitis.