Retroviruses can recur after 13 years of healing, but the probability of recurrence is low. The full name of reoccurrence is aplastic anemia, and its main mechanism is bone marrow hematopoietic failure, patients can show symptoms such as anemia, infection and bleeding due to the decrease of blood cells. Patients with aplastic anemia can be treated with drugs such as cyclosporine and testosterone undecanoate, as well as bone marrow transplantation. Aplastic anemia is a refractory disease, patients can be standardized treatment to improve the survival period, some patients can be cured after treatment, but there is also a possibility of relapse, but patients who have been cured for 13 years, the probability of relapse is low. The above drugs are recommended to be used according to the doctor’s prescription.