Clifford attributes a combination of colder weather and the plague's natural life cycle as reasons for it dying out. She notes that outbreaks of plague in England almost always lasted around a year.
Depiction of the plague in Italy in the 17th century, seen in the Museo Storico Nazionale Dell'Arte Sanitaria.Fortunately, the self-imposed quarantine was successful in preventing further transmission. Clifford said that if it had reached Manchester or Sheffield it most likely would have become a severe epidemic with thousands of fatalities.
Such an amazing story of the strength of character of the villagers involved. They must have been so brave.