In early period which endemic is called Black Death:

🧠 Explanation:

The Black Death, an early endemic, was the plague, killing millions. For history students, this highlights medieval history, making it a key topic for studying pandemics, European history, and public health. The plague devastated populations. Understanding this clarifies disease impacts. It’s essential for analyzing history, public health, and epidemiology. Studying the Black Death offers insights into how pandemics shape societies, crucial for history, public health, and epidemiology.