What are the consequences of drug and alcohol abuse on health?

Good health can be maintained through a balanced diet, personal hygiene, regular exercise, awareness about diseases, proper disposal of waste, control of vectors, and hygienic food and water resources. Diseases can be broadly categorized into infectious and non-infectious diseases. Infectious diseases are easily transmitted from person to person, while non-infectious diseases include cancer and other health conditions.Drug and alcohol abuse adversely affects health, not increases longevity or productivity.A person is considered not healthy when the functioning of one or more organs or systems of the body is adversely affected by various signs and symptoms, also known as having a disease, not just physical fitness, balanced diet and regular exercise, or good mental health.