What does "affect component" mean in this article on well-being?
As the CDC page you linked states,


  Well-being integrates mental health (mind) and physical health (body) resulting in more holistic approaches to disease prevention and health promotion.


Mental health and physical health are the 2 main components to well-being, and both these components have components within them.

Mental health will have positive affects and negative affects as 2 of its components.