My older brother (26M) I'll call him V, his wife, (24F) I'll call her K. My mother (54F) I'll call her G, and My father (52M) I'll call him H. My Grandma (92F) I'll call her B, and her care worker I'll call Q.

First; Thanks to all of you who gave me advice, it was very helpful.

I was able to get G alone in her bedroom, I brought up my concerns and she agreed that it wasnt smart to casually bring it up, G and H apparently had a chat last night about the whole thing, H's trip to India was moved to later in the year then it already was, therefore by the time we would go up to meet the baby, H wont have had the injections yet, the next time we would see V and K would be after the time they had set (three months) so there would be no problems there. we've also now got a baby shower in a few weeks, but B needs a flu injection, B and Q wont be able to make it because thy have something else on, they plan to go over to meet the baby in November instead, so everythings sorted out, V and K know about this and their cool wih it.