“…ARIMA (1, 1, 0), ARIMA (3, 2, 2), ARIMA (3, 2, 2), ARIMA (3, 1, 1), ARIMA (1, 0, 3), ARIMA ((1, 2), 0), ARIMA (1, 1, 0), ARIMA (0, 2, 1), and ARIMA (0, 2, 0) models are selected as the best models, depending on their average absolute percentage error (MAPE) are reduced the most)), which are Ukraine, Romania, Republic of Moldova, Serbia, Bulgaria, Hungary, the USA, Brazil, and India (4.70244, 1.40011, 2.67551, 2.16373, 2.98154, 2.11139, 3.21569, 4.10596, and 2.78051). This survey shows that the ARIMA model is reasonable for expectations in current emergencies and provides ideas for the epidemiological stage of these regions (Ilie et al 2020 ). KırbaşI, SözenA, Tuncer AD, and Kazancıoğlu F. et al confirmed that the COVID-19 instances in Denmark, Belgium, Germany, France, the UK, Finland, Switzerland, and Turkey have passed the autoregression integrated moving average (ARIMA), non-linear autoregression neural network (NARNN), and long-term memory (LSTM) methods.…”