Global analysis of daily new COVID-19 cases reveals many static-phase countries including the United States potentially with unstoppable epidemic

Figure 2 Comparative analyses of coronavirus disease 2019 tests between downward and static-phase countries. A-C: Difference analysis of case density (panel A), testing density (panel B), and level of positive coronavirus disease 2019 (COVID-19) tests (panel C) among the four types of countries. Data of each type of countries are plotted as the mean ± SD with 95% confidence interval (in the box), with median being shown as short lines. Statistics were analyzed using Microcal Origin software with ANOVA algorithm, and significance levels (P value) are designated. P values less than 0.05 are colored in red; D and E: Comparisons of time-dependent levels of testing density (panel A) and positive COVID-19 tests (panel B) between typical static-phase countries (United States and United Kingdom) and downward countries (South Korea and Italy). Data for the United States, Italy, and South Korea were collected from the Website of One World Data (URL: https://ourworldindata.org/grapher/full-list-cumulative-total-tests-per-thousand) and Data for United Kingdom from COVID-19 United Kingdom update (URL: https://covid19uk.live/#/).