Disease refers to an abnormal condition affecting the body or mind that impairs normal functioning and can be caused by pathogens such as bacteria, viruses, parasites, or genetic disorders.
Related terms
Epidemic: A widespread occurrence of a particular disease in a community at a particular time beyond what is normally expected.
Pandemic: An epidemic occurring worldwide or over a very wide area crossing international boundaries and affecting many people simultaneously.
Immunity: The ability of an organism (or population) to resist infection from specific pathogens due to previous exposure or vaccination.