The duration of plague has no definite value, the shortest is between 1~2 years, and the longest is leprosy which has been prevalent in the world for nearly 3000 years.

Leprosy, when it comes to the name of the disease, it is estimated that everyone is familiar with it. It is a chronic infectious disease caused by Leprosy Bacillus, which has been prevalent in China for nearly 2000 years (and in the world for nearly 3000 years).

Plague in history

1, 430 BC-427 BC, the plague in Athens lasted for about 3 years, and Athens became a deserted city.

2. 164- 180, the plague broke out in ancient Rome about 16 years, and ancient Rome once declined.

3. During the period of171-219, the Jian 'an Great Plague in the Eastern Han Dynasty in China lasted for about 50 years, and five people died of "Jian 'an Seven Sons".

4. In 54 1-543, a three-year plague broke out in the Mediterranean, and Constantinople instantly became a "dead city".

5. During the period of A.D. 1347- 1353, the Black Death broke out in Europe, which lasted for about 6 years. ?

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