Answer:
In the early years of scientific medicine, most clinicians and researchers thought only in terms of single causes: specific agents that cause a specific disease. For example, an infection was considered to result only from the proliferation of bacteria, while other kinds of ill health might result from viruses, toxins, accidents, or flaws in a person's genetic makeup. More recent research highlights the relationships between health and behavioral, psychological, and social variables.
Explanation:
Brainliest please
