What can be said about health-care systems based on the text?

Health-care systems indeed vary significantly across cultures, reflecting the diverse beliefs, practices, and resources available to different societies. This variation can be seen in the methods of treatment, what is considered health or illness, and the social structures surrounding healthcare. Although certain elements of healthcare may be common in many contexts, such as the presence of practitioners and medical knowledge, it does not make them universally identical or applicable across all cultures. Each society formulates its healthcare system based on unique historical, environmental, and social factors, resulting in distinct approaches to health and illness.

Considering this, while aspects of health care can be universally acknowledged, the correct understanding aligns more with the idea that they reflect significant cultural diversity rather than a singular, universal model found in all societies.