Epidemics have happened throughout time. And, our ancestors may have died during these terrible times.

If you are unable to “find” a relative from one census to the next, look at the history of their place of residence – was there a medical reason for the relative no longer being in the census? If you can’t find the father/mother, try searching for the children. It could be that one or both of the parents died, so the children would be in the census living in other households.