Table 2. HIV-1 subtype diversity in samples from 202 Bulgarian residents.
| Subtype | Number | Prevalence (95% confidence limits) | Travel Outside of Bulgaria (number of persons)1 |
| B | 104 | 51.5 (44.4, 58.6) | England (1), Greece (1), Italy (1), South Africa (1), Romania (1), Spain (1), Germany (2), unspecified (1) |
| C | 7 | 3.5 (1.4, 7.0) | unspecified (1) |
| A1 | 5 | 2.5 (0.8, 5.7) | Greece (1) |
| F1 | 2 | 1.0 (0.1, 3.5) | (0) |
| H | 2 | 1.0 (0.1, 3.5) | (0) |
| 01_AE | 40 | 19.8 (14.5, 26.0) | Nicaragua (1) |
| 02_AG | 15 | 7.4 (4.2, 12.0) | Ghana (1), Cyprus (1), unspecified (1) |
| 04_cpx | 1 | 0.5 (0.0, 2.7) | (0) |
| 05_DF | 4 | 2.0 (0.5, 5.0) | Democratic Republic of Congo (1), unspecified (1) |
| 14_BG | 2 | 1.0 (0.1, 3.5) | Spain (1) |
| 36_cpx | 1 | 0.5 (0.0, 2.7) | Libya (1) |
| URFs and new sub-subtypes | 19 | 9.4 (5.8, 14.3) | Greece (1), Russia (1), South Africa (1), Nigeria (2), unspecified (3) |
1. Self-reported travel outside of Bulgaria which may not accurately reflect geographic origin of infection.