According to Osho, self-realization doesn’t perfect the body; the body remains the ‘house of disease.’ With attachment gone, the awakened one is in the body yet not of it; they no longer pour life-force into it, so it grows fragile and simply runs on past karma until it falls. After supreme knowing, the capacity to create another body ceases—no rebirth.
Your body still gets sick and ages, but you stop clinging to it; it runs on old momentum until it drops, and you don’t take another body.