How can infectious and noninfectious affect personal health?

Infectious diseases obviously affect us; our personal health, and the personal health of other people. If someone else has an infectious disease then you would probably stay away from such a person. If you had an infectious disease, other people would probably stay away from you. This isn't true for noninfectious diseases where we don't have to worry about infecting or being infected by other people. (I got that answer from another user. Not mine)

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.