as a general rule yes, but the quality and quantity are unknown and can not be used as a gaurentee for immunity aginst something, hence why children still need child hood immunisations even if breast fed.

this is still abit up in the air as they are saying children under 10 are not to recieve the vaccine.
so a bit contraindicative as to why pregnant women who will then flow on the immunity through breast feeding and placental transfer are ok but if a baby was born teh day before the release of the vaccine they recieve nothing nor to the children aged 0-9.