If health and wellness are more than the absence of disease, how are these terms defined?

If health and wellness are more than the absence of disease, how are these terms defined?

1.-  If health and wellness are more than the absence of disease, how are these terms defined?

2.- How would you describe the difference to a friend?

3.- Studies indicate Americans are less healthy than their comparable peers in other countries. What are the reasons for these findings? Include references.