Rota vaccine & breastfeeding

Ok so I've researched this vaccine ALOT.

I am not anti vaccine. My 8 week old has her first injections tomorrow, however I don't want the rota virus one. My two boys haven't had it as it wasn't given when they were babies.

After researching it I've found information that it's not useful for a baby who's exclusively breastfeeding because the breastmilk breaks down the vaccine. Has anyone else heard this?