No FJ not if she had never had an infection before - just to illustrate.

5 days before her birth she uses a shopping trolley. The person who just parked it had a coldsore - coughed into her hands and then put her hands on the trolley handle. Miras Mama comes along and uses the trolley... Gets an itch on her face and viola - virus is live and has found another source...
This virus incubates in Miras Mama - Mira births her baby and that morning she finds her mouth tight and buring - later on a sore erupts. Her baby is born - Miras mother kisses her and loves her up... The virus has found another host. But this host has no antibodies to protect her - it takes months to build up antibodies sadly Mira doesn't have enough fight in her - and the medical staff didn't cotton on to what was up...

So breastfeeding affords protection but as I said in my previous post ONLY if the mother has prior exposure... Maybe tghere would be a minute amount of conversion occuring but not enough,,,