Answer:
The Plague of Justinian or Justinianic Plague (541–549 AD) was the beginning of the first plague pandemic, the first Old World pandemic of plague, the contagious disease caused by the bacterium Yersinia pestis. The disease afflicted the entire Mediterranean Basin, Europe, and the Near East, severely affecting the Sasanian Empire and the Byzantine Empire and especially its capital, Constantinople.[1][2][3] The plague is named for the Byzantine emperor in Constantinople, Justinian I (r. 527–565) who, according to his court historian Procopius, contracted the disease and recovered in 542, at the height of the epidemic which killed about a fifth of the population in the imperial capital.[1][2] The contagion arrived in Roman Egypt in 541, spread around the Mediterranean Sea until 544, and persisted in Northern Europe and the Arabian Peninsula, until 549.[1]
Explanation:
In 2013, researchers confirmed earlier speculation that the cause of the Plague of Justinian was Yersinia pestis, the same bacterium responsible for the Black Death (1347–1351).[4][5] The latter was much shorter, but still killed an estimated one-third to one-half of Europeans. Ancient and modern Yersinia pestis strains closely related to the ancestor of the Justinian plague strain have been found in Tian Shan, a system of mountain ranges on the borders of Kyrgyzstan, Kazakhstan, and China, suggesting that the Justinian plague originated in or near that region.[6][7]
The Plague of Justinian is the first and the best known outbreak of the first plague pandemic, which continued to recur until the middle of the 8th century.[1][8] Some historians believe the first plague pandemic was one of the deadliest pandemics in history, resulting in the deaths of an estimated 15–100 million people during two centuries of recurrence, a death toll equivalent to 25–60% of Europe's population at the time of the first outbreak.[9][10][11][12] The plague's social and cultural impact has been compared to that of the Black Death (the second plague pandemic) that devastated Eurasia in the 14th century.[13] Research published in 2019 argued that the two-hundred-year-long pandemic's death toll and social effects have been exaggerated, comparing it to the modern third plague pandemic (1855-1960s).[14][15]
