Ruiz/Sedano - Typhoid Epidemic in Zacatecas

Hi, all. While attempting to obtain some oral history from my grandmother on my Ruiz and Sedano lines from Tlaltenango & Sedanos, Zacatecas, I found out that one of my Ruiz ancestors was born "in the year of the typhoid epidemic." Now, I imagine this was probably sometime after 1920, which is the approximate year of my great-great grandfather's, Felipe Ruiz Róbles, marriage to my great-grandmother. The reason I mention him is becuase he was one of those assigned to carry the catloads of typhoid victims to the "camposanto." My grandmother says that when the poor, homeless people who would go around asking for "un atolito," the cart carriers would say, "Atolito? ¡Cual! ¡Camposanto!" and then throw them in the cart and take them to the camposanto (Probably because they figured they were already carrying the disease.). Anyway, I know that is not relevant, but I thought it was an interesting anecdote. My real purpose for this post is to find out if anyone has come across any reference to this "year of the typhoid epidemic" that may help me to find the birth year for this ancestor and possible a lead to follow for my elusive paternal lines...

Thanks for reading this!

Cristina