Pestilence is less virulent during the winter…
1349 CE
Pestilence is less virulent during the winter months, and spreads less rapidly.
The Black Death in England had survived the winter of 1348-49, but during the following winter it gives in, and by December 1349 conditions are returning to relative normality.
It has taken the disease approximately five hundred days to traverse the entire country and kill a quarter of the English population, profoundly disturbing feudal society.