The risk is overall low, often this debate gets hijacked by debating over degree of risk, which is impossible to exactly establish based on epidemiological data. All the data we have indicates no risk to vaccination, and some risk to not vaccinating. There are also swaths of the population that are on immune-suppressing meds for a wide range of illness, older people in general, and anyone else with a compromised immune system that also rely on herd immunity.

Edit: In case you were interested in hard data on non-responder rates here is that data: https://www.cdc.gov/mmwr/preview/mmwrhtml/rr6007a1.htm

No, because legally fetuses aren’t children.

Ethically yes, obviously it's many orders of magnitude worse to deny your septic child antibiotics than it is to not vaccinate them but in my view it's on the same spectrum. The data we have is all epidemiological, which is inherently somewhat fuzzy, however a plethora of well-designed studies have crunched the numbers different ways and absolutely no link can be found between rates of childhood vaccination and autism. Vaccination was considered one of the massive health breakthroughs of the 20th century. We have pretty much eradicated Hepatitis B for instance while it's still rampant in many Asian countries. From a Medical standpoint there is no valid reason not to vaccinate. I'm not advocating forcible vaccination and understand why that could make this hysteria worse however as a society we should examine where this misinformation is arising and how it's being amplified.