@moimichme and @MRex ;just picking up on the tail end of the bf and vaccine conversation.
Wendy the breastfeeding pharmacist is looking into it all.
I genuinely can't see how or why it would be an issue, unless the baby has severe allergies as potentially there could be an exacerbation simply as it seems to have caused similar in those with an allergy. I can't see how the actual vaccine part could go through bm.
Boobs are thought to be part of the immune system; they make and transfer antibodies and pre /probiotics. If the vaccine creates an immune reaction, that's all it can do but we never use vaccines in mothers in that way with children.
I know it's about the actual data though.
(Despite feeding a toddler currently I hadn't even twigged this might be a barrier to the vaccine for me!)