The symptoms of HIV can differ from person-to-person and some people may not get any symptoms at all for many years. Without treatment, the virus will get worse over time and damage your immune system. There are three broad stages of HIV infection, with different possible effects.
What are the three levels of cultural complexity that sociologists use to study different cultures? The three levels are perception, aspects that are below the conscious levels, and patterns of behavior. Each of these can be used to help learn about a society. Edit
Current usage of the term complexity in the field of sociology typically refers specifically to theories of society as a complex adaptive system. However, social complexity and its emergent properties are central recurring themes throughout the historical development of social thought and the study of social change.