Medical malpractice. If the patient uses some infusion equipment that has been used by other patients, he will be infected through the infusion, causing the occurrence of hepatitis A. This is a medical accident. Medical accidents refer to medical institutions and their medical staff violating medical and health management laws, administrative regulations, departmental rules, diagnosis, treatment and nursing norms and routines during medical activities, misdiagnosis and improper treatment measures, resulting in varying degrees of damage to the patient's intelligence and body, or missed diagnosis and delayed opportunities. Accidents causing damage.