Gale Encyclopedia of Medicine. Definition Acquired immune deficiency syndrome (AIDS) is an infectious disease caused by the human immunodeficiency virus (HIV). There are two variants of the HIV virus, HIV-1 and HIV-2, both of which ultimately cause AIDS. Description AIDS was first recognized in the United States 1981 in homosexual men. Today is seen in …

By: National Center for Chronic Disease Prevention and Health Promotion Chronic and serious diseases are very common these days and a lot of people live in fear of developing major illness. But people can actually do something about this by taking preventive health measures instead of worrying about it. Sure, life does not hold any …

By: MedecineNet.com Alcoholism formerly called alcohol dependence or alcohol addiction, is the more severe end of the alcohol use disorder spectrum. It is a destructive pattern of alcohol use that includes tolerance to or withdrawal from the substance, using more alcohol or using it for longer than planned, and trouble reducing its use or inability …

Definition Cancer is not just one disease, but a large group of almost 100 diseases. Its two main characteristics are uncontrolled growth of the cells in the human body and the ability of these cells to migrate from the original site and spread to distant sites. If the spread is not controlled, cancer can result …

Definition Smoking is the inhalation of the smoke of burning tobacco encased in cigarettes, pipes, and cigars. Casual smoking is the act of smoking only occasionally, usually in a social situation or to relieve stress. A smoking habit is a physical addiction to tobacco products. Many health experts now regard habitual smoking as a psychological …

By: National Institute on drug Abuse Many people do not understand why or how other people become addicted to drugs. It is often mistakenly assumed that drug abusers lack moral principles or willpower and that they could stop using drugs simply by choosing to change their behavior. In reality, drug addiction is a complex disease, …

Even though most people know that eating certain foods can increase their heart disease risk, the challenge is really about changing their eating habits. Heart disease, which is also known as cardiovascular disease or coronary heart disease, actually kills more Americans each year compared to all kinds of cancers put together. It accounts for up …

By: Obesity Society Definition Obesity is an abnormal accumulation of body fat, usually 20% or more over an individual’s ideal body weight. Obesity is associated with increased risk of illness, disability, and death. The branch of medicine that deals with the study and treatment of obesity is known as bariatrics. As obesity has become a …

Definition Good nutrition can help prevent disease and promote health. There are six categories of nutrients that the body needs to acquire from food: protein, carbohydrates, fat, fibers, vitamins and minerals, and water. Proteins Protein supplies amino acids to build and maintain healthy body tissue. There are 20 amino acids considered essential because the body …