Modern DNA analysis is yielding insights into the Justinian plague.       https://www.cam.ac.uk/research/news/justinianic-plague-was-nothing-like-flu-and-may-have-hit-england-before-constantinople Below is the academic article on which the above article is based. The article’s purpose was to prove the enormous impact that the Justinian plague had on the ancient world and refute any arguments to the contrary. It seems to me, however, that the argument against a significant