Prevalence of a determinant mutants in children less than 15 years who were immunised with plasma derived vaccine or recombinant vaccine in 1989, 1994, and 1999
| Type of vaccine | No of children immunised | No of immunised children infected with HBsAg positive mutants | No of immunised children infected with HBsAg negative mutants |
|---|---|---|---|
| HBsAg, hepatitis B surface antigen. | |||
| *p = 0.122 by Poisson distribution. | |||
| Plasma derived vaccine | |||
| 1989 | 356 | 3 | 0 |
| 1994 | 1175 | 5 | 1 |
| 1999 | 968 | 2 | 0 |
| Total | 2399* | 10* | 1 |
| Recombinant vaccine | |||
| 1989 | 0 | 0 | 0 |
| 1994 | 114 | 0 | 2 |
| 1999 | 389 | 0 | 1 |
| Total | 503* | 0* | 3 |