For the record, I'm in Washington too, and YES it is required for K entry now. I just registered my dd for kindergarten and had to sign that she is unvaxed because I refuse to get that stupid vaccine. She's missing a couple others at the end of a series (I think MMR is one) but still, so stupid.
If you want to selectively vax, I'd suggest going to the CDC website and reading up on each individual disease. For instance, getting a baby vaccinated against Hep B just seems completely and utterly idiotic. Several are only concerns in kids under 2-and if your child is home with you, theres almost zero chance of them catching them (again, these arnt things you can pick up from a shopping cart handle or the air). Others, the immunity length is questionable and honestly, the diseases are treatable, or not that bad. In my moms generation, measles and mumps weren't seen as a scary thing-to them, it was like getting chicken pox. But now everyone is so scared of it and if things continue, two generations down the line, everyone is going to be so scared of chicken pox. Its just silly. Polio is transmitted by oral-fecal contact and there were zero cases of it in the US last year. Basically reading up on each and every one of the diseases and talking to my mom/grandparents about some of them as well, all my fears went out the window.
I think I'm waiting until my dd is 5 or so and doing one vax at a time, for those things I feel its necessary to get. The 5 year old vax schedule is so much smaller to begin with, I dont think she'll end up with many

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