Partner is anti vax. How do I get past this?

Backstory: My (39M) partner (29F) is very skeptical of anything mainstream in the healthcare world. I didn’t learn until after we were pregnant that she is anti vax.

When our son was due for his first round of shots, I convinced her to do her research (as would I) and we would compare notes. She ended up using ChatGPT and came to the conclusion that she would let our boy get his shots. Bullet dodged, I was super relieved.

Now we are due for our second round and out of the blue she told me last night she doesn’t want to do it. I was so upset I couldn’t even engage, so now that I’ve slept on it I’m looking for advice here.

-she has a friend who is even more anti vax than her which I think is influencing her thinking

-she is smart in a common sense way, but she is not the one to hit the books and do actual research. Basically she’s an Instagram professor 🙄.

-she lost a sister over a huge fight around the Covid vax (which my partner is a strong no on)

-in general, I think she fell down the rabbit hole with the anti covid vax pseudo media that now has her convinced all vaccines are bad

I honestly don’t know how to get past this. I want to advocate for my son’s health and to do it firmly, but I’ve always felt like the mother gets final say. I will resent her strongly if she goes through with this.

What do you think dads?

Edits for clarity:

-the vaccine schedule starts at 2 months (completed)

-we are now on the 4 month set of shots (son is 5mo today, so we are slightly behind)

-partner and I got pregnant immediately into dating each other, which is problematic for obvious reasons, but that is why I didn’t have the background knowledge on vax history