Болезнь

Diseases are conditions that cause a disruption in the normal functioning of the body. They can be caused by various factors including infections, genetic predispositions, bad habits, environment and other external influences. Diseases can manifest themselves with various symptoms such as pain, weakness, fever, organ and system dysfunction. Some illnesses are acute and quick-onset, while others may be chronic and long-lasting. Treatment of diseases may include drug therapy, surgery, physical therapy, diet and other methods. It is also important to take steps to prevent disease, including a healthy lifestyle, regular medical check-ups, and immunizations.