OptionalboneImmutable starting bone density, captured on first progression tick so the decay curve targets a stable baseline rather than recursively re-decaying its own output (scenario-specific, used by Mars/Lunar physics modules).
OptionalboneBone density percentage (scenario-specific, used by Mars/Lunar)
OptionalcumulativeCumulative radiation exposure in millisieverts (scenario-specific, used by Mars/Lunar)
OptionaldeathOptionaldeath
Scenario-defined health fields beyond the standard set