However, the ratio R 12 [which is defined as N 1 /( N 22 – N 21 )] showed a decreasing trend with N 22 –N 21 (Fig. 2 ).
← all excerpts
Spatiotemporal dynamics of confirmed case distribution during the COVID-19 pandemic in China: data comparison between 2020/04-2020/08 and 2021/04-2021/08.
1
—
—