What is the minimum interval between the administration of two doses of the MMR vaccine?

Correct Answer: B

Rationale: The correct answer is B (4 weeks) for the minimum interval between two doses of the MMR vaccine. This interval is necessary for the body to develop a strong immune response to the vaccine components. Waiting at least 4 weeks allows the immune system to properly process and respond to the initial dose before receiving the second dose. Administering the second dose too soon may result in a weaker immune response and decreased effectiveness of the vaccine. Choices A, C, and D are incorrect as they are not in line with the recommended minimum interval for effective vaccination.

Correct Answer: C

Rationale: The correct answer is C: Smallpox. In 1980, the World Health Organization declared the Philippines and other countries in the Western Pacific Region 'free' of smallpox due to successful global vaccination campaigns. Smallpox is caused by the variola virus and is characterized by a distinctive rash. The other choices are incorrect because: A: Pneumonic plague is a severe form of the bubonic plague caused by the bacterium Yersinia pestis. B: Poliomyelitis is a viral infection that can lead to paralysis, but it was not eradicated in 1980. D: Anthrax is a bacterial infection that primarily affects animals but can also infect humans.

Correct Answer: B

Rationale: The sex ratio is calculated by dividing the number of males by the number of females and multiplying by 100. In this case, (35,299,000 / 34,968,000) x 100 = 100.94:100. This means for every 100 females, there are 100.94 males, indicating a slightly higher number of males. Choice A (99.06:100) is incorrect as it suggests fewer males than females, which is not the case. Choice C (50.23%) and choice D (49.76%) are incorrect as they represent percentages rather than ratios, leading to a misleading interpretation of the data.

Correct Answer: D

Rationale: The correct answer is D, as it highlights the sustainability aspect crucial in primary health care. Sustainable health programs align with the community's development level, ensuring long-term effectiveness. A: Providing free health services is not an indicator of success as sustainability and community involvement are key. B: While empowering local officials is important, it doesn't directly measure the success of the primary health care approach. C: Providing care based on identified needs is a fundamental aspect but doesn't guarantee success without sustainability.

Correct Answer: D

Rationale: Step 1: Define false negative - An individual with the disease incorrectly identified as disease-free. Step 2: Understand sensitivity - Ability to correctly identify individuals with the disease. Step 3: False negatives indicate low sensitivity. Step 4: Sensitivity is a key characteristic of a diagnostic test. Step 5: Therefore, the correct answer is D: Sensitivity. Summary: A: Effectiveness - Overall ability of the test to achieve its intended purpose. B: Efficacy - Ability of the test under ideal conditions. C: Specificity - Ability to correctly identify individuals without the disease. D: Sensitivity - Ability to correctly identify individuals with the disease.