In any event, I stumbled across a story that I had not previously had this much detail on. The summary here is excellent:
It certainly helps explain why Holmes Jr. is so roundly ignored in some circles. It's hard to rehabilitate the guy who wrote a Supreme Court opinion justifying sterilizing a rape victim because she got pregnant (<-- an oversimplification). Using mandatory vaccination as part of your argument just guarantees silence on all sides.
What a nasty opinion that was in every respect, "dodging" both equal protection and cruel-and-unusual. Next time someone asks you for a Supreme Court opinion you don't agree with, cite this one.