I get that both tie into the stability of countries but the current stability system is very 1 dimensional kind of like the happiness system in Civ 5. Buildings like apothecaries, hospitals, aqueducts and sewage treatment should improve city growth and maybe prevent a new repeatable type of narrative event based on illness. It's possible public health effects stability but it feels really weird being able to have a happy city in the modern era by neglecting basic public health infrastructure and prioritizing building movie theatres.