Fig. 5

Parameters of the spreading of Covid19 in Romania estimated using the above averaging of the neural networks. Notice the behavior of the parameters \(\beta , \gamma _1,\gamma _2\) which tend to decrease over the period of almost two years. Interestingly we see the parameter \(\alpha\) having large values during the Fall of 2020 and lower values during the summer of 2021. This suggests that the proportion of real infected people is between \([1/0.9, 1/0.1]=[1.11,10]\) to the reported infected. This show that roughly only half of the infected get reported