A disease is a condition or disorder that affects the functioning of the body or mind and results in characteristic signs and symptoms. Diseases can be caused by a variety of factors, including infections, genetics, environmental exposures, and lifestyle factors. Some diseases are acute, meaning they come on suddenly and resolve quickly, while others are chronic, meaning they develop over time and may last for a long period.
There are many different types of diseases, including infectious diseases (such as the flu or HIV), chronic diseases (such as diabetes or heart disease), and genetic diseases (such as cystic fibrosis or sickle cell anemia). Many diseases can be prevented or managed through lifestyle changes, such as eating a healthy diet and exercising regularly, or through medical treatments, such as medications or surgery.
The study of diseases and their causes, prevention, and treatment is known as medicine. There are many different branches of medicine, including general practice, internal medicine, surgery, and pediatrics, each of which focuses on the diagnosis and treatment of specific types of diseases.
Virulence Definition Virulence define the intensity of a pathogen to cause disease. The Virulence varies among different microbial species. Virulence enables
Maintain an infectious disease in a human population the pathogens must need to be transmitted from one host or source
