How did diarrhea kill so many people before and now it’s not that big of a deal?

Question

Title really, is it just that our diet is better and decent food is much more abundant or is it just general hygiene?

In: 36

Answer 1

2017 1.7 million died from diarrhea. It’s still a huge problem.

Source: https://ourworldindata.org/diarrheal-diseases