States should use expert medical society recommendations to shape their own vaccine policies. They can direct public health departments and clinicians to follow the guidance. If medical societies fail to organize quickly, states could create their own independent vaccine advisory boards. That approach is far from ideal — 50 separate boards with varying recommendations would add confusion — but inaction is worse.
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Relying on states will create a patchwork of protections. In states with weak public health leadership, children will be left behind. But this approach offers key benefits.

It protects residents in states committed to science-based policy.

Yeah, yeah, Tennesseans won't benefit from this policy, but some Tennesseans could travel to a sane state.