Table 1 Number of human SARS-CoV-2 strains in GISAID and the sample sizes included in this study for different periods
Period | Number of strains | |
|---|---|---|
in GISAID | in this study | |
Jan 1–31 | 6 | 6 |
Feb 1–29 | 16 | 16 |
Mar 1–10 | 72 | 30 |
Mar 11–20 | 94 | 30 |
Mar 21–31 | 158 | 30 |
Apr 1–10 | 100 | 30 |
Apr 11–20 | 21 | 21 |
Apr 21–30 | 50 | 30 |
May 1–10 | 7 | 7 |
Total | 524 | 199 |