Malaria and the Fall of Rome

BBC - History - Ancient History in depth: Malaria and the Fall of Rome: The DNA work of Robert Sallares has now confirmed that malaria was a killer during late Roman times. The children of Lugnano died of malaria, and it is likely that there were also many adult victims of the disease, although their cemetery has not yet been found. This would have made it difficult for farmers to collect crops and for the local army commanders to raise troops. What was once a footnote in the history books on the fall of Rome, must now become a whole chapter. David Soren's theory that malaria contributed to the fall of Rome has finally been vindicated.

Oy-R contagion can lead to a collapse of a Y-Ro state whether from R terrorism or an R disease.