Which information must be analyzed to derive an adequate explanation of disease? (Select One that does not apply.)

Correct Answer: C

Rationale: The epidemiological triangle includes the agent (pathogen), host (people who are susceptible and become ill), and environment (the geographic area where people became ill). These three areas allow for an explanation of disease. Explanation of the health care system in the community is not part of this model.

Correct Answer: A

Rationale: Snow’s cholera study (A) mapped cases to describe distribution, identifying the Broad Street pump. Analytical (B) tests hypotheses, experimental (C) involves intervention, and clinical (D) focuses on patients.

Correct Answer: C

Rationale: Rabies (C) is zoonotic, transmitted from animals (e.g., dogs) to humans. A, B, and D are primarily human diseases.

Correct Answer: A

Rationale: Epidemic (regional) vs. pandemic (global) differs by geographic spread (A) (e.g., flu vs. COVID-19). B, C, and D vary but aren’t defining.

Correct Answer: B

Rationale: Prospective cohorts (B) track incidence and establish temporality (e.g., smoking before cancer). A, C, and D are false; they’re costly, long, and prone to loss.