Fig. 3

Comparisons of the changing trend of the average daily increase of cumulative cases of COVID-19 of seven countries against time (A) and against cumulative cases (B). A, the average daily increase rate for every week. B, the average daily increase rate for different levels of cumulative cases: 1. 100–1000, 2. 1000–5000, 3. 5000–10,000, 4. 10000–50,000, 5. 50,000–100,000, 6. > 100,000. The initial daily increase rate of all countries was calculated starting from the cumulative cases larger than and close to 100