Final answer:
Screening is a major secondary level of prevention measure in healthcare, aimed at early detection and treatment of illness. Examples of cancer screening include mammograms, PSA tests, and Pap tests. It plays a crucial role in early diagnosis and treatment of cancer.
Step-by-step explanation:
Screening is a major secondary level of prevention measure in healthcare. It falls under the category of secondary prevention, which focuses on early detection and treatment of illness. Cancer screening include mammograms for breast cancer, PSA tests for prostate cancer, and Pap tests for cervical cancer.
These screenings are aimed at detecting common cancers in asymptomatic individuals who may be at high risk. While screening has both risks and benefits, it plays a crucial role in early diagnosis and treatment, which are keys to curing cancer.