Which of the following is an example of secondary prevention?

Correct Answer: C

Rationale: Secondary prevention aims to detect and treat a disease in its early stages to prevent complications. Screening for hypertension (Choice C) is an example as it involves identifying individuals at risk of developing high blood pressure-related issues. Vaccination (Choice A) is a form of primary prevention. Health education (Choice B) is more focused on promoting healthy behaviors. Rehabilitation therapy (Choice D) is part of tertiary prevention, aimed at improving function after a disease has occurred.

Correct Answer: C

Rationale: The correct answer is C: Antiretroviral therapy. This is a key strategy because it involves giving HIV medications to the mother during pregnancy, labor, and delivery, as well as to the newborn, significantly reducing the risk of transmission. Antiretroviral therapy helps lower the viral load in the mother's body, making it less likely for the virus to be passed on to the child. Exclusive breastfeeding (choice A) can increase the risk of transmission, routine immunization (choice B) does not directly prevent mother-to-child transmission of HIV, and nutritional supplementation (choice D) is not a primary strategy for preventing transmission.

Correct Answer: C

Rationale: The correct answer is C: Infant mortality rate. This indicator reflects the number of infants who die before reaching one year of age per 1,000 live births. It is a crucial measure of the overall health of a population as it reflects the quality of healthcare, nutrition, and living conditions. High infant mortality rates indicate poor health outcomes and inadequate healthcare services. A: Literacy rate is not directly related to measuring the health status of a population. B: GDP measures the economic performance of a country and does not directly reflect the health status of its population. D: Employment rate is an indicator of the labor market situation, not specifically related to health status measurement.

Correct Answer: B

Rationale: The correct answer is B: Physical inactivity. Physical inactivity is a major risk factor for cardiovascular diseases because regular exercise helps maintain a healthy heart and blood vessels. It reduces the risk of developing conditions like high blood pressure, high cholesterol, and obesity, which are all linked to cardiovascular diseases. In contrast, choices A, C, and D are not major risk factors for cardiovascular diseases. Low cholesterol levels (A) are usually considered beneficial for heart health, low blood pressure (C) is generally a sign of good cardiovascular health, and while adequate sleep (D) is important for overall well-being, it is not directly linked to cardiovascular diseases.

Correct Answer: C

Rationale: The correct answer is C: Vaccination. Vaccination is the most effective method for preventing the spread of infectious diseases because it helps build immunity against specific pathogens, reducing the likelihood of infection and transmission. Vaccines train the immune system to recognize and fight off harmful microorganisms. Antibiotic treatment (A) is used to treat bacterial infections, not prevent the spread of diseases. Quarantine (B) is effective in isolating infected individuals but does not prevent the initial spread of diseases. Nutritional supplementation (D) can support overall health but is not a direct method for preventing infectious diseases.