Final answer:
A 50-year-old patient receiving an annual physical examination and screening with no known health problems is referred to as primary prevention.
Step-by-step explanation:
The type of care that a 50-year-old patient receives during an annual physical examination and screening, with no known health problems, is referred to as primary prevention.
Primary prevention aims to prevent the development of diseases and conditions by promoting healthy behaviors and early detection. It includes measures such as regular check-ups, screenings, vaccinations, and lifestyle interventions. By identifying potential health risks and adopting preventive measures, primary prevention helps individuals maintain good health and reduce the likelihood of developing future health problems.