[Lucius Cornelius Sulla]

The figure I read was that it killed 100 million altogether. Obviously there is a bit of a dispute about the totals.

[muawiyah]

Regarding the counting of plague victims ~ all of those counts are pretty much estimates made up by locals in later centuries who knew where they kept the mass graves (if any).

In areas where people just died in large numbers and no one was left to bury them, the numbers aren't known.

Some estimates rely on apparent economic activity "before" and "after".

The Chinese estimates are huge, and equally unreliable. The fact that a relatively small group ~ the Mongols ~ were able to subsequently conquer China and India ~ then, and now, the world's most populous nations ~ should give all of us some idea of who died and who didn't.