Solve the Growth Model of the HIV Using Z-Number

In real world, most of the phenomena are based on doubt and the information which we have from various subjects such as economic, political, physics and etc., has evaluated according to verbal valuables. Every day, we see new advances in medical science and given the level of public health and information of the various strata of society compared to the past, we see that today, humans are more willing to use more accurate methods to diagnose and treat diseases. In the meantime, the use of mathematical knowledge has become an important tool for physicians. In this paper, we use differential equations to predict the spread of diseases through a population and we solve it using Z-number.