The critical findings of our present study are that, compared with the infants who did not experience postnatal CMV infection, the CMV infected infants had similar body weights and heights (Table 5) and did not have more severe diseases requiring hospitalization, and that the infants with active primary CMV infection (positive for both CMV IgG and IgM) had a similar rate of ALT elevation, compared to the infants with latent CMV infection (CMV IgG positive alone) and the infants without CMV infection (negative for both CMV IgG and IgM). This evidence concerns the gene GPT and cytomegalovirus infection.