Correct Answer: C

Rationale: A serum bilirubin level of 12 mg/dL in a newborn is concerning and can indicate a significant risk of hyperbilirubinemia, which requires immediate medical intervention to prevent complications like kernicterus. Jaundice at 26 hours (Choice A) is a symptom, not a laboratory result, and needs monitoring but not an immediate report. Hematocrit of 55% (Choice B) may be elevated but is not indicative of hyperbilirubinemia. A positive Coombs test (Choice D) indicates the presence of antibodies on the newborn's red blood cells but does not directly correlate with the risk of hyperbilirubinemia.

Correct Answer: B

Rationale: The correct answer is B: 'Statistics'. Statistics is the systematic approach of obtaining, organizing, and analyzing numerical facts to draw conclusions. Vital statistics, morbidity, and mortality are more specific terms within the field of statistics. Vital statistics focus on births, deaths, marriages, and divorces. Morbidity refers to the incidence of illness or disease in a population. Mortality specifically deals with deaths in a population. Hence, B is the most comprehensive and fitting choice for the definition provided.

Correct Answer: B

Rationale: To succeed as a change agent, being an information seeker is crucial. While being an information provider, motivator, and leader are important roles, actively seeking information is fundamental to understanding the community's needs, concerns, and challenges before implementing effective changes. This active information seeking helps in making informed decisions and developing strategies that address the specific issues faced by the community. Therefore, the correct choice is B. Choices A, C, and D are also important roles but may not be as fundamental as actively seeking information.

Correct Answer: C

Rationale: Tertiary care is the correct answer because it involves specialized care provided by medical centers and regional or provincial hospitals. Primary care (Choice B) refers to basic healthcare services usually delivered by general practitioners, nurses, and other healthcare professionals. Secondary care (Choice A) involves specialized services provided by medical specialists and other health professionals who generally do not have first contact with patients. Intermediate care (Choice D) is not a recognized level of care in the typical healthcare system hierarchy; it may cause confusion as it's not a standard term used to describe levels of care.

Correct Answer: A

Rationale: The correct answer is to validate that the children who were sent home had chickenpox. This is crucial in confirming the presence of varicella, which is necessary for appropriate management and control of the outbreak. Option B is not the first intervention because the focus initially is on verifying the cases within the daycare center. Option C is incorrect as it suggests a prolonged exclusion period without confirming the diagnosis. Option D is inappropriate and potentially harmful, as sending a child back without proper assessment can lead to further spread of the infection.