Which biological used in Expanded Program on Immunization (EPI) is stored in the freezer?

Correct Answer: B

Rationale: The correct answer is B: OPV. The oral polio vaccine (OPV) used in the Expanded Program on Immunization (EPI) is stored in the freezer to maintain its potency. OPV is a live vaccine that requires cold storage to prevent the virus from becoming inactive. DPT, Hepatitis B vaccine, and Measles vaccine are typically stored in the refrigerator, not the freezer, as they are either killed or attenuated vaccines that remain stable at higher temperatures. Therefore, the need for freezer storage specifically points to OPV as the correct answer.

Correct Answer: B

Rationale: The correct answer is B: Number of registered live births. The general fertility rate is calculated by dividing the number of live births in a specific period by the total number of women of reproductive age during that period. This numerator reflects the actual occurrence of live births in the population, making it the most appropriate measure for determining fertility rates accurately. A: Estimated midyear population is not used as the numerator because it does not directly measure fertility rates. C: Number of pregnancies in the year includes all pregnancies, not just live births, which would overestimate the fertility rate. D: Number of females of reproductive age is not used as the numerator as it represents the total population, not the specific group giving birth.

Correct Answer: A

Rationale: The correct answer is A: PD 651. This law is the Civil Registry Law, which mandates the registration of births within 30 days. PD 651 was enacted specifically to ensure the timely and accurate recording of vital events. Act 3573 pertains to the reporting of communicable diseases, not birth registration. RA 3753 focuses on the use of an alias or pseudonym, not birth registration. RA 3375 involves the registration of firearms, not births. Overall, PD 651 is the most relevant law in requiring the registration of births within 30 days, making it the correct choice.

Correct Answer: B

Rationale: The correct answer is B: OPV. The oral polio vaccine (OPV) used in the Expanded Program on Immunization (EPI) is stored in the freezer to maintain its potency. OPV is a live vaccine that requires cold storage to prevent the virus from becoming inactive. DPT, Hepatitis B vaccine, and Measles vaccine are typically stored in the refrigerator, not the freezer, as they are either killed or attenuated vaccines that remain stable at higher temperatures. Therefore, the need for freezer storage specifically points to OPV as the correct answer.

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.

Correct Answer: C

Rationale: The correct answer is C: De facto. This method assigns individuals to a specific location based on where they are physically located during the census. "De facto" means "in fact" or "in reality." This ensures accurate representation of the population in a specific area at the time of the census. A: De jure refers to assignment based on legal residence, not necessarily physical location. B: De locus is not a standard term in census methodology. D: De novo means "from the beginning" and is not relevant to population assignment in a census.

Correct Answer: D

Rationale: The correct answer is D because all of the choices can be used to describe the sex composition of the population. A, the sex ratio, compares the number of males to females. B, sex proportion, also refers to the distribution of males and females in a population. C, population pyramid, visually displays the age and sex distribution of a population. Therefore, any of these tools can be utilized to describe the sex composition accurately.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Yin represents yielding, negative, and feminine energy in traditional Chinese medicine. 2. It is associated with qualities like darkness, coldness, and rest. 3. Yin balances the opposing force of Yang in the body. 4. In TCM, maintaining a balance between Yin and Yang is crucial for overall health. 5. Therefore, the correct answer is A: Yin. Summary: - Choice B (Yang) is incorrect as it represents the opposite force to Yin. - Choice C (Qi) is incorrect as it refers to the vital energy flow in TCM. - Choice D (Chai) is incorrect as it is not a term used in traditional Chinese medicine.

Correct Answer: D

Rationale: The correct answer is D because it exemplifies intersectoral linkages by showcasing collaboration between different sectors (public health and education). This cooperation enables sharing of resources, expertise, and information to address broader community health needs. Choice A focuses on a single-sector referral system, Choice B emphasizes teamwork within the same sector, and Choice C highlights endorsement within a specific profession, all lacking the cross-sector collaboration seen in Choice D.