how did the health of american families change in the 1950s?

Question

opcode · Answer

People moved from cities to suburbs. 
Visual picture: 
$\large \text{Cities} \Rightarrow \text{Suburbs}$
Not to mention the time was well.
The country had gotten to work, commercial buildings and highways were created. 
Also WWII had just ended thus creating a boom in population. Not to forget television! The worlds favorite way of entertainment was created.

opcode · Answer

Because of all these things, you can say everyday life improved so as health. In a sense...
Cities were usually riddled with diseases, or sicknesses because of overpopulation. So you can see how it help to a point.

anonymous · Answer

I would say it went up. Globalization, massive farming. Food, and shelter and clothing was more readily accessable.