Health is the level of functional and/or metabolic efficiency of an
organism at both the micro(cellular) and macro(social) level. In the
medical field, health is commonly defined as an organism's ability to
efficiently respond to challenges (stressors) and effectively restore
and sustain a "state of balance", known as homeostasis.
Another widely accepted definition of health is that of the World Health
Organization (WHO), which states that "health is a state of complete
physical, mental and social well-being and not merely the absence of
disease or infirmity".
We are lucky and we do take care of ourselves. Going to the
doctors for checkups and eating the right foods is a major ingredient in
our (to date) successes.
Given those definitions we are in pretty good shape but we have had our
share of scares including lung cancer and
major back surgery.