You may need to clarify what you mean by "side by side". Is that 5 separate plots or one plot with 5 categories.
What is the value of your disease variables? Histogram normally is used to group into ranges to see patterns of a continuous variable?
It sounds more like you might be looking for a Vbar type chart where the height is a count (or sum of a 0/1 coded variable).
Providing an example data set (remove any sensitive information) so we can see what your current data looks like will help provide better answers.
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