Chronic kidney failure is not contagious. Strictly speaking, chronic kidney failure is not an independent disease; it is a state of disease. It refers to various causes that damage the kidneys, leading to the loss of kidney tissue, and ultimately, the kidneys lose their ability to perform excretory functions. This state is called chronic kidney failure. Chronic kidney failure itself is not contagious. Contagious diseases involve some type of pathogen, whereas the common causes of chronic kidney failure include chronic nephritis, diabetes, kidney diseases, hypertensive nephropathy, etc. None of these diseases are contagious, hence chronic kidney failure is also not contagious.