Introduction
reproductive-aged mothers [, CMV infection, breasts
CYTOMEGALOVIRUS, CMV INFECTION
Localized reactivation of cytomegalovirus (CMV) in breasts during lactation may occur in CMV immunoglobulin (Ig) G-seropositive women, and reactivated CMV is excreted via human milk (HM) [HM is the primary route of CMV infection in very-low-birth-weight (VLBW) infants since the introduction of CMV-negative, leukocyte-free blood products reduced transfusion-related CMV infection [Numerous efforts have been made to find an effective method for decreasing the risk of CMV transmission via HM. This is a particularly important issue in South Korea, where the seropositive rate for CMV is over 95% among reproductive-aged mothers [