Distribution Characteristics of SNPs (rs12979860, rs8099917) near IL-28B in Chinese CHC and Healthy Children Patients: In the 277 CHC children patients, SNP rs12979860 includes C/C (87.7%), C/T (11.9%) and T/T (only one case) genotypes. The gene discussed is IFNL3; the disease is cryohydrocytosis.