Case report: probable transmission of vaccine strain of yellow fever virus to an infant via breast milk

Kuhn, Susan; Twele-Montecinos, Loreto; MacDonald, Judy; Webster, Patricia; Law, Barbara
March 2011
CMAJ: Canadian Medical Association Journal;3/8/2011, Vol. 183 Issue 4, pE243
Academic Journal
Case Study
The 17D yellow fever vaccine is a live-virus vaccine that has been in use since the 1940s. The incidence of encephalitis after yellow fever vaccination among young infants is much higher than among children older than nine months of age. Until recently, avoidance of vaccination by breastfeeding women who have received yellow fever vaccine had been based on theoretical grounds only. We report the probable transmission of vaccine strain of yellow fever virus from a mother to her infant through breastfeeding.


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