Medicine has come a long way in my time, and people have learned how to care for themselves better in order to ensure that they live long, full, and healthy lives.

[ or stubbornly extended lives, as is the case with admiral mccoy, who has kept on living well past the accepted length of a human lifespan. ]

The only true immortal I'm familiar with is an omnipotent, nonlinear, noncorporeal being and I highly doubt that counts. [ q never counts. ]