I think this question has been posed on Lactnet, but fresh from Medscape
yesterday was this:

Ask the Experts on . . .
Breastfeeding and the Rabies Vaccine

 Question
A breastfeeding mother has been bitten by a dog with unknown rabies status
and has started the rabies vaccine. Is it safe to continue breastfeeding?
 Response
from Kathryn M. Edwards, MD, 06/12/01
All rabies vaccines consist of inactivated virus so they pose no risk of
transmission. It is not known whether inactivated rabies virus or the
corresponding antibodies cross into the breast milk.[1] However,
difficulties with breastfeeding would not be anticipated and are extremely
unlikely.
References
Grabenstein JD, ed. ImmunoFacts: Vaccines and Immunologic Drugs. St. Louis,
Mo: Facts and Comparisons; 1998.
---------------
Anna Swisher
LLL Leader
Austin, TX

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