The new definition of health that is proposed takes into account the difference between what health is for (its role) and what health is (its composition).

Health, as defined by the World Health Organization (WHO), is "a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity."[1][2] This definition has been subject to controversy, as it may have limited value for implementation.[3][4][5] Health may be defined as the ability to adapt and manage physical, mental and social challenges throughout life.[6]

Where are they though?

What have scientists learned about plant behavior by studying the dodder plant