A small number of items of a type, often two
Couple (relationship), two people to whom each is the significant other of the other
Couple (mechanics), a system of forces with a resultant moment but no resultant […]

Evolutionary medicine or Darwinian medicine is the application of modern evolutionary theory to understanding health and disease. Modern medical research and practice have focused on the molecular and […]

Sickness behavior is a coordinated set of adaptive behavioral changes that develop in ill individuals during the course of an infection.[1] They usually (but not necessarily)[2] accompany fever and aid survival. […]

Many diseases and disorders can be prevented through a variety of means. These include sanitation, proper nutrition, adequate exercise, vaccinations and other self-care and public health measures.
Medical […]

A disease is a particular abnormal condition, a disorder of a structure or function, that affects part or all of an organism. The study of disease is called pathology which includes the study of cause. Disease is […]