Fitting and forecasting the trend of COVID-19 by SEIR+ CAQ dynamic model
10.3760/cma.j.cn112338-20200216-00106
- VernacularTitle: 基于改进的SEIR+CAQ传染病动力学模型进行新型冠状病毒肺炎疫情趋势分析
- Author:
Yongyue WEI
1
;
Zhenzhen LU
1
;
Zhicheng DU
2
;
Zhijie ZHANG
3
;
Yang ZHAO
1
;
Sipeng SHEN
1
;
Bo WANG
4
;
Yuantao HAO
2
;
Feng CHEN
1
Author Information
1. Department of Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
2. Department of Medical Statistics, School of Public Health, Zhongshan University, Guangzhou 510080, China
3. Department of Epidemiology and Biostatistics, School of Public Health, Fudan University, Shanghai 200032, China
4. Meinian Institute of Health, Beijing 100191, China
- Publication Type:Journal Article
- Keywords:
Novel coronavirus pneumonia;
SEIR+ CAQ dynamic model;
Epidemic forecasting
- From:
Chinese Journal of Epidemiology
2020;41(4):470-475
- CountryChina
- Language:Chinese
-
Abstract:
Objectives:Fitting and forecasting the trend of COVID-19 epidemics.
Methods:Based on SEIR dynamic model, considering the COVID-19 transmission mechanism, infection spectrum and prevention and control procedures, we developed SEIR+ CAQ dynamic model to fit the frequencies of laboratory confirmed cases obtained from the government official websites. The data from January 20, 2020 to February 7, 2020 were used to fit the model, while the left data between February 8-12 were used to evaluate the quality of forecasting.
Results:According to the cumulative number of confirmed cases between January 29 to February 7, the fitting bias of SEIR+ CAQ model for overall China (except for cases of Hubei province), Hubei province (except for cases of Wuhan city) and Wuhan city was less than 5%. For the data of subsequent 5 days between February 8 to 12, which were not included in the model fitting, the prediction biases were less than 10%. Regardless of the cases diagnosed by clinical examines, the numbers of daily emerging cases of China (Hubei province not included), Hubei Province (Wuhan city not included) and Wuhan city reached the peak in the early February. Under the current strength of prevention and control, the total number of laboratory- confirmed cases in overall China will reach 80 417 till February 29, 2020, respectively.
Conclusions:The proposed SEIR+ CAQ dynamic model fits and forecasts the trend of novel coronavirus pneumonia well and provides evidence for decision making.
