Which best describes the Tuskegee Syphilis Study?

Correct Answer: D

Rationale: As treatment was knowingly withheld over many years resulting in incredible harm to the subjects and their families, public outrage over unethical, racist, and discriminatory behavior of the researchers continues today.

Correct Answer: B

Rationale: Epidemiology studies disease distribution and determinants (B) to inform public health. Vaccine development (A), treatment (C), and training (D) are not its primary aims.

Correct Answer: C

Rationale: Infectious period (C) is when transmission occurs (e.g., flu). A is exposure to symptoms, B is pre-infectious latency, D is post-infectious.

Correct Answer: C

Rationale: Population at risk (C) is those susceptible (e.g., unvaccinated for measles). A is cases, B is immune, D is recovered.

Correct Answer: C

Rationale: Matching (C) controls confounders (e.g., age, sex) in case-control studies. A, B, and D are unrelated or incorrect.