| Number | Frequency |
Hepatitis B | 17 | 34.7 |
Hepatitis C | 2 | 4.1 |
Rubélla | 1 | 2 |
Paramyxovirus (mumps) | 3 | 6.1 |
Varicella-zona | 8 | 16.4 |
Enteroviruses | 4 | 8.1 |
HIV | 14 | 28.6 |
Total | 49 | 100 |