Charles Dickens making up historical events?

It appears that Charles Dickens has noted that there was a measles epidemic in England at the time the story took place which was around 1837.  However, after some research I found that there was actually no measles epidemic at this time. But there was indeed a cholera epidemic near this time period which is an infection in the small intestine which causes really large amounts of watery diarrhea. Could it be perhaps Charles Dickens made up the measles epidemic in order for it to better fit the story, or did Dickens mistakenly believed that there was a measles epidemic instead of a cholera one? One of the major reasons for Dickens's writings was to criticize or notice upon the society in his time period. However, does he have to make up cause and effect events in order to better criticize his time period's society and government? This takes away the credibility of criticism against social problems and if these problems indeed existed. What else has Charles Dickens perhaps lied to us about.