**Core Concept**
International notifiable diseases are infectious diseases that must be reported to global health authorities due to their potential to cause widespread harm, facilitate transmission across borders, or lead to significant morbidity and mortality. These diseases are tracked by the World Health Organization (WHO) and other global health agencies to facilitate timely responses and prevent the spread of outbreaks.

**Why the Correct Answer is Right**
The correct answer is a disease that is included in the International Health Regulations (IHR) and is subject to international reporting requirements. This is typically a disease with a high potential for transmission, severity, or impact on global health, such as smallpox, polio, or SARS. The reporting of these diseases allows for rapid sharing of information and coordinated responses among countries to prevent the spread of outbreaks.

**Why Each Wrong Option is Incorrect**
**Option A:** This disease may be notifiable at the national level but is not typically subject to international reporting requirements.
**Option B:** This disease is not considered a high-priority notifiable disease under international regulations.
**Option C:** This disease has been eradicated through global vaccination efforts and is no longer considered a significant public health threat.

**Clinical Pearl / High-Yield Fact**
The International Health Regulations (IHR) require countries to report certain infectious diseases to the World Health Organization (WHO) within a specified timeframe, typically 24-48 hours. This enables global health authorities to rapidly respond to outbreaks and prevent the spread of disease.

**Correct Answer: C. SARS is not the correct answer because it is notifiable internationally, but it is not the best answer choice here.**