Semnan University International Journal of Nonlinear Analysis and Applications 2008-6822 12 2 2021 11 01 Suggested methods for prediction using semiparametric regression function 2263 2267 5373 10.22075/ijnaa.2021.5373 EN Aseel Sameer Mohamed Family and Community Medicine Department, Al Kindy Medical College, University of Baghdad, Iraq Journal Article 2021 03 04 Ferritin is a key organizer of protected deregulation, particularly below risky hyperferritinemia, by straight immune-suppressive and pro-inflammatory things.  We conclude that there is a significant association between levels of ferritin and the harshness of COVID-19. In this paper, we introduce a semi-parametric method for prediction by making a combination of NN and regression models. So, two methodologies are adopted, Neural Network (NN) and regression model in designing the model; the data was collected from a nursing home hospital for period 11/7/2021- 23/7/2021, the sample size is 100 covid positive patients with 12 females \& 38 males out of 50, while 26 female \& 24 male are non-COVID out of 50. The input variables of the NN model are identified as the ferritin and a gender variable. The higher results precision is attained by the multilayer perceptron (MLP) networks when we applied the explanatory variables as the inputs with one hidden layer, which covers 3 neurons, as the planned many hidden layers are with one output of the fitting NN model which is used in stages of training and validation beside the actual data. We used a portion of the actual data to verify the behavior of the developed models, we find out that only one observation is a false predictive value. This means that the estimation model has significant parameters to forecast the type of Covid cases (Covid or no Covid). https://ijnaa.semnan.ac.ir/article_5373_04a1bf2d968f1ce381cf1f9184a807a9.pdf