So if AGE of measles acquisition isn't associated with breastfeeding...does that imply that the immunity provided by breastfeeding is indefinite?
I just found the abstract from which you quoted. The cohort tested is from 1970..,wouldn't most of the mothers of infants born in 1970 have had the measles - wild virus? The vaccine wasn't introduced until 1963, so if the mothers WERE vaccinated, it would have been as adolescents/adults. SO, the article doesn't give us any information about measles protection via breastfeeding of vaccinated mothers vs. naturally-immunized mothers (those who have had measles themselves).
I wonder if that research exists.
Ahhh, and when you google measles breastfeeding, the third link is a mothering.com discussion of 2008, which leads to this article - about passive immunity via the placenta NOT breastfeeding, right?
Vaccine. 1997 Apr-May;15(6-7):620-3.
Passive immunity against measles during the first 8 months of life of infants born to vaccinated mothers or to mothers who sustained measles.
De Serres G, Joly JR, Fauvel M, Meyer F, Mâsse B, Boulianne N.
Neutralizing antibody titers of 47 infants whose mothers sustained measles (measles group) and 70 whose mothers were vaccinated (vaccine group) were compared at birth, 4 and 8 months of age. All children had antibodies at birth and 88% at 4 months. At 8 months, 49% had antibodies in the measles group and 15% in the vaccine group (P < 0.001). The geometric mean titers were significantly lower in the vaccine group than in the measles group and the difference corresponded to the antibody loss occurring in only 1.5 months of life. This small difference may reflect past exposure to wild virus of many vaccinated mothers.
And if we believe our own posters I was wrong about protection provided via breasfeeding -