Table 1. Characteristics of SARS-CoV-2 genome database used in present study.
| Worldwide | Spain | |
| HQ: High-quality; LQ: Low-quality. | ||
| Total genomes in database | ||
| n | 41 362 | 1 259 |
| Ambiguities | 12 646 | 553 |
| Indels | 1 378 | 57 |
| MNPs | 763 | 17 |
| Different haplotypes | 19 968 | 680 |
| Singleton haplotypes | 15 934 | 565 |
| Substitutions | 14 291 | 1 000 |
| Singleton substitutions | 7 189 | 746 |
| HQ genomes in database | ||
| n | 26 506 | 922 |
| Ambiguities | 4 936 | 216 |
| Indels | 795 | 40 |
| MNPs | 318 | 12 |
| Different haplotypes | 13 559 | 518 |
| Singleton haplotypes | 10 942 | 438 |
| Substitutions | 10 663 | 788 |
| Singleton substitutions | 5 313 | 609 |
| LQ genomes in database | ||
| n | 14 856 | 337 |
| Ambiguities | 9 340 | 351 |
| Indels | 873 | 21 |
| MNPs | 474 | 6 |
| Different haplotypes | 8 141 | 209 |
| Singleton haplotypes | 6 709 | 178 |
| Substitutions | 8 408 | 353 |
| Singleton substitutions | 4 802 | 275 |