To the Editor We read with great interest the study performed by Dollard et al entitled “Sensitivity of Dried Blood Spot Testing for Detection of Congenital Cytomegalovirus Infection.”1 In this study, more than 12 000 children were screened for congenital cytomegalovirus (cCMV) infection by detection of DNA by CMV–polymerase chain reaction (CMV-PCR) in saliva and in dried blood spots (DBS).