The Willowbrook Hepatitis Study is known for which ethically troubling aspect?

• A. It intentionally infected mentally disabled children with hepatitis to study a vaccine.
• B. It involved only adult volunteers with informed consent.
• C. It followed modern ethics oversight.
• D. It avoided any harm or deception.

Answer: (A)

The central issue is exploiting a vulnerable population by deliberately infecting children with hepatitis to study a vaccine, without proper informed consent and adequate protection. In the Willowbrook study, intellectually disabled children at a state institution were exposed to hepatitis to observe disease progression and test vaccines. The situation raised serious questions about autonomy, consent, and whether the benefits justified the risks when participants could not make independent choices and guardians or institutions controlled participation. It also highlighted how vulnerable groups can be exposed to research risks without fair safeguards, contributing to reforms in research ethics, such as stronger informed consent standards and independent oversight. The other options miss the key ethical problem: it did not involve only adults with consent, it did not have modern ethics oversight, and it did not avoid harm or deception.