On the WHO site one can found an article about Hep b:

http://www.who.ch/programmes/cdr/pub/newslet/update/updt-22.htm

citation:
"Risk of transmission by breastfeeding

Breastfeeding has been suggested as an additional mechanism by which
infants may acquire HBV infection,
because small amounts of Hepatitis B surface antigen (HBsAg) have been
detected in some samples of
breastmilk. However, there is no evidence that breastfeeding increases
the risk of mother to child transmission.
A follow up study of 147 infants born to mothers known to be carriers of
HBV in Taiwan (4) found similar
rates of HBV infection in 92 children who were breastfed compared to 55
who were bottle fed. A study in
Britain, involving 126 subjects, also showed no additional risk for
breastfed versus non breastfed infants of
carrier mothers (5). This study included the measurement of HBeAg status
of the mothers, but found no
association between maternal e-antigen status and transmission rates.
These findings suggest strongly that any
risk of transmission associated with breastmilk is negligible compared
to the high risk of exposure to maternal
blood and body fluids at birth. Experts on hepatitis, however, do have
concerns that breast pathology such as
cracked or bleeding nipples or lesions with serous exudates could expose
the infant to infectious doses of
HBV. "

--
Annelies Bon               http://www.flnet.nl/~0bon01/bfbronnen.html
mother of Dirk 7yo, Tom 5yo, Pieter 22mo
mailto:[log in to unmask]
bf counsellor in training of the Dutch bf org "Borstvoeding Natuurlijk"