The in-vitro study strongly suggests that C2 is worse than C1, because in the southern part of China it is mainly C2 genotype and in the northern part of China it is C1 genotype.

• 在体外试验中，C2基因型的预后明显比C1基因型差，中国南方地区主要为C2基因型，而北方以C1基因型为主。