RT Journal Article SR Electronic T1 Waning of Measles Antibody Titers in Young Infants JF AAP Grand Rounds JO AAP Grand Rounds FD American Academy of Pediatrics SP 30 OP 30 DO 10.1542/gr.43-3-30 VO 43 IS 3 YR 2020 UL http://aapgrandrounds.aappublications.org/content/43/3/30.abstract AB