You will be given a definition of a task first, then some input of the task.
In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

It was a major event in the history of public health , and the founding event of the science of epidemiology .
Output:
This has been perceived as a major event in the history of public health and regarded as the founding event of the science of epidemiology , having helped shape public health policies around the world .