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Hepatitis B virus (HBV) infection remains a severe global health issue causing hepatitis or hepatocellular carcinoma.Other study confirmed that DNA methyltransferase genes (DNMTS)were unregulated and then it decreased viral gene expression,in the meanwhile,changed host CpG islands methylation.To find out differentially methylated position (DMP) and mechanism,12 normal and hepatitis samples for each were analysed after whole-genome methylation sequencing.Principal component analysis (PCA) revealed individual difference of the same class of samples.It suggested that individual difference is a reason cannot be neglected of the different methylated status of genome.