Since vaccinated are spreading this around nearly as much as unvaccinated, the involuntary manslaughter argument is moot. Getting your own vaccine doesn't help other people not die...only you. Even high-vaccination regions are having waves of infection that dwarf previous ones. (Israel, Scotland, Hawaii)
That said, allowing civil suits to punish people that gave you a virus that killed you, would be effective to keep both vaxed and unvaxxed careful and staying at home while sick. Hard to prove where you got it, but just a few successful suits will keep people honest.
Mea culpa, though: the chart I remember was of cases not spread/fan-out. I guess it is pretty hard to judge who is spreading it and who is not, in the public. Most articles tend to measure viral shedding or load as an indicator, which does support my stance, but that's science journalism which has been wrong a lot lately. I won't ask any HN reader to make a conclusion based on what I claimed.
I encourage everyone to get vaccinated if they can, but vaccination doesn't stop the spread of the virus. It probably slows the spread, which is good, but the magnitude is unclear.
That said, allowing civil suits to punish people that gave you a virus that killed you, would be effective to keep both vaxed and unvaxxed careful and staying at home while sick. Hard to prove where you got it, but just a few successful suits will keep people honest.