Sounds like you're scared to confront and lecture him, his replies do make sense sometimes you know
As somebody whose mother in the mid to late 80's said to herself "what's this triple MMR shot shit and why are the schools and government pushing them so hard?", she gave us a head start in life by refusing to participate. The first 2 got recalled pretty soon after, and the 3rd and beyond variations continued to cause autism and other unhealthy outcomes.
When you understand the system, you'll understand that it's a population management tool...
I've had one vaccine which I begrudgingly accepted in about 2009.... got swine flu immediately after, lost 20-25 kilos over a couple weeks literally living in a walk in shower area on a plastic garden chair puking and shitting through the slats (often simultaneously), but too weak to move except to change the temp of the shower from hot to cold and back again because the fever was up and down. Up until a few years after that, there were publicly available research studies tying that particular flu shot to a higher susceptibility of contracting swine flu.... then they all suddenly went offline.
My workmate from Singapore had his wife get the same shot, and she's still half paralyzed because of it.
I've sworn off EVERYTHING since then and my youngest is and I believe always will be vax free.
We discuss small talk subterfuge to weed out prospective jabbed fuckers when she's ready to start relationship and a family.
No mudbloods!!! Ever!!