Search results
Results From The WOW.Com Content Network
Health has a variety of definitions, which have been used for different purposes over time. In general, it refers to physical and emotional well-being, especially that associated with normal functioning of the human body, absent of disease, pain (including mental pain), or injury.
The following outline is provided as an overview of and topical guide to concepts related to infectious diseases in humans.. Infection – transmission, entry/invasion after evading/overcoming defense, establishment, and replication of disease-causing microscopic organisms (pathogens) inside a host organism, and the reaction of host tissues to them and to the toxins they produce.
Also called silent disease, silent stage, or asymptomatic disease. This is a stage in some diseases before the symptoms are first noted. [23] Terminal phase If a person will die soon from a disease, regardless of whether that disease typically causes death, then the stage between the earlier disease process and active dying is the terminal phase.
Health is the level of functional or metabolic efficiency of a living organism. In humans, it is the ability of individuals or communities to adapt and self-manage when facing physical, mental, or social challenges. The most widely accepted definition of good health is that of the World Health Organization Constitution. It states: "health is a ...
Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". [1] [2] Analyzing the determinants of health of a population and the threats it faces is the basis for public health. [3]
The inception of a disease is not a firmly defined concept. [1] The natural history of a disease is sometimes said to start at the moment of exposure to causal agents. [2] Knowledge of the natural history of disease ranks alongside causal understanding in importance for disease prevention and control.
Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in a defined population.. It is a cornerstone of public health, and shapes policy decisions and evidence-based practice by identifying risk factors for disease and targets for preventive healthcare.
The process of DNA methylation is the most studied epigenetic response as it relates to the developmental origins of health and disease. The methylation of chief regulatory cytosines changes the DNA's hydrophobicity and begins to inhibit interactions with transcription factors responsible for the expression of the gene.