Research Article

Modeling Periodic HFMD with the Effect of Vaccination in Mainland China

Table 2

Chi-square values and degrees of freedom from January 2008 to December 2015 and January 2016 to June 2019.

YearJan. 2008–Dec. 2015Jan. 2016–June 2019

Chi-square value68.0733.19
DF8228
AV104.1441.34

Note: AV denotes the accepting value is at 5% significant level with degrees of freedom DF.