sickness
activities that are designed to help people feel healthier and happier, or the business of providing these activities:
The company wanted a bigger share of the estimated €60 billion Germans spend on wellness each year.
They offer fitness and wellness programs to help deal with stress.
The university plans to construct a new football stadium and wellness centre.
These therapies are widely available in America for wellness and health maintenance as well as disease management.
The residents were either taking their daily power walk or hurrying to their next wellness appointment.
The doctor's wellness clinic attracts the health conscious from around the world.

SMART Vocabulary: related words and phrases

Health in general
attachment
constitutional
excess deaths
excess mortality
functioning
health
healthful
healthfully
healthily
healthy
hygienic
non-carcinogenic
non-medical
public health
sanitarily
sanitary
sanitation
scraping
shape
welfare

Examples from literature

They show the seven elements of wellness – the state of being healthy. 
You may want to have categories, or groups of ideas, like the elements of wellness: emotional, spiritual, intellectual, environmental, occupational, physical, and social. 

wellness | American Dictionary

wellness
noun[ U ]
us/ˈwel·nəs/
the condition of being healthy:
The book promotes wellness through diet and exercise.

Examples of wellness

wellness
Perception of wellness is increased for the patient, family and professionals when there is less-reliance on medical technology.
Imaging genetics of brain longevity and mental wellness: the next frontier?
Rehabilitation nursing has aspirations towards a more holistic approach which stresses health and wellness rather than disability and illness.
We advocate for social policies that can catalyze the realization of the laudable and complementary goals of wellness enhancement and problem prevention.
To have the patient entering into and recovering from surgery fix his or her mind on future wellness is therapeutic.
Factors promoting wellness in the aged person : an ethnographic study.
Literature shows that men with incurable prostate cancer alternate between experiences of illness and wellness.
Each party brings to the clinical encounter its own cultural heritage and belief system about health, illness, wellness, and disease.
Unfortunately, many children in modern society grow up under family and life conditions that impede the formation of a base of psychological wellness.
Early psychological wellness is a key gateway to a child's later development.
The strategy requires giving primacy to all areas of prevention and wellness promotion, and public health nurses are arguably at the centre of that endeavour.
The outer layer maintains the illusion of wellness, and people do maintain the illusion of being well to a point.
Conversely, serious deficits in early wellness development are likely to predispose significant impediments to later wellness.
Effective prevention and wellness enhancement require a nexus of supportive social policies.
To sum up, the preceding section offered policy recommendations for wellness-enhancement-type prevention steps.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.