Autovaccines are types of vaccines that are prepared using an individual's own bacteria or viruses. They are created by collecting a sample of the person's infected tissue or fluid, culturing the pathogens in a laboratory, and then inactivating or weakening them before they are injected back into the same individual to stimulate an immune response.

The use of autovaccines is not widespread, and their effectiveness and safety have been debated in the medical community. Some studies suggest that autovaccines may be useful for treating certain recurrent or chronic infections, such as those caused by bacteria that are difficult to eradicate with antibiotics. However, more research is needed to establish their role in modern medicine.

It's important to note that autovaccines should not be confused with autologous vaccines, which are made from a patient's own cells or tissues and are used in cancer immunotherapy to stimulate the immune system to attack cancer cells.