CD4 and AIDS: The established survival and prognosis model for people living with HIV and AIDS revealed that demographic factors, such as age, sex, and BMI, as well as laboratory indicators, such as the World Health Organization (WHO) clinical staging of HIV and AIDS, CD4 T lymphocyte count (CD4), viral load, and hemoglobin, significantly impacted the survival and prognosis of people living with HIV and AIDS [3-14].