Mom doesn’t respect wishes for my baby?

I have a 4 month old, I’m terrified of him getting RSV since it’s RSV season. My grandparents (her parents) are wanting to come visit. Which don’t get me wrong, I love my grandparents more than anything in the world, but they are bringing my little cousin who they have a majority of the time that is in elementary school. And they are sick, ALL THE TIME. They always have some sort of sickness, the flu, Covid, respiratory infections it seems like every other week. I told my mom that I just am worried about him being around her and them because they are sick it seems like all the time. She gets defensive and says I shouldn’t keep him wrapped in a bubble all the time. Which I do understand her point of view, she is right that I shouldn’t keep family from him because of paranoia. But it’s just hard because my anxiety wants to shield him from sickness. Did anyone else deal with this? I think I just need someone to tell me to stop being so paranoid lol