由于许多模型没有考虑疫情中真实的确诊病例数和真实的死亡病例数，本文利用

Since many models do not consider the actual number of confirmed cases and the actual number of deaths in the epidemic, this article uses the cumulative number of confirmed cases, the number of deaths, and the number of recovered cases in four counties in the United States to propose a method that is consistent with the current A new model of the epidemic process.

Since many models do not take into account the true number of confirmed cases and the true number of deaths in the outbreak, a new model is proposed using multi-source data sets such as the cumulative number of confirmed cases, the number of deaths, and the number of recovered cases in four counties and cities in the United States.

Because many models do not consider the real number of confirmed cases and the real number of dead cases in the epidemic, this paper proposes a new model which is consistent with the current epidemic process by using the cumulative number of confirmed cases, the number of dead cases, the number of recovered cases and other multi-source data sets of four counties in the United States.<br>