From Wikipedia, the free encyclopedia. Military branch (also service branch or armed service) is according to common standard the subdivision of the national armed forces of a sovereign nation or state. In classical terminology, the three basic military branches are the Army, Air Force, and Navy. Army. Air Force.
Health factors in the County Health Rankings represent what influences the health of a county. We measure four types of health factors: health behaviors, clinical care, social and economic, and physical environment factors. In turn, each of these factors is based on several measures. A fifth set of factors that influence health (genetics and biology) is not included in the Rankings. Alcohol & Drug Use.
Susceptibility to Infections. Chronic stress may have an effect on the immune system's response to infections. Several studies claim that people who are under chronic stress have low white blood cell counts and are more vulnerable to colds. Once a person catches a cold or flu, stress can make symptoms worse.