“Health is a condition of complete physical, mental, and social prosperity and not only the shortfall of infection or sickness.

This means that health is a resource to support an individual’s function in wider society, rather than an end in itself. A healthful lifestyle provides the means to lead a full life with meaning and purpose.

In 2009, researchers publishing in the LancetTrusted Source defined health as the ability of a body to adapt to new threats and infirmities.

They base this definition on the idea that the past few decades have seen modern science take significant strides in the awareness of diseases by understanding how they work, discovering new ways to slow or stop them, and acknowledging that an absence of pathology may not be possible.