Across the globe, HIV is a constant threat to public health. While the STD is less of a problem in the United States as a whole than in other countries, as separate states, the prevalence of HIV is nevertheless significant. It is especially apparent in the deep south. This is likely the result of lack of health insurance as compared to northern and western states. North Carolina happens to be one of these states. However, infection does not occur in only the South. There is greater prevalence in denser or highly populated areas. California and New York, for instance, in contrast to Montana, boasts higher rates of STD infection because everyone is in close proximity. As with Montana, because nobody lives in midwestern states, not as many people have HIV. Across the US, males and African-Americans are most frequently infected.