Low-magnitude cytomegalovirus (CMV)–specific cellular and humoral immune responses in milk compared with that in blood of CMV-seropositive mothers of very low-birth-weight (VLBW) infants including CMV-specific cellular responses (A), CMV-binding immunoglobulin (Ig) G and IgA titers (B), normalized CMV-binding IgG and IgA titers (C), CMV IgG and IgA avidity (D), CMV-neutralizing titers (E), and normalized CMV-neutralizing titers (F) in milk (open symbols) and blood (filled symbols) of CMV-seropositive mothers of VLBW preterm infants. Lines indicate median value; *P < .05. Abbreviation: ND, not detectable.