Table 1 Immunization schedule.
Group | Vaccine formulation | Primary immunization | Secondary immunization (at 4 weeks after primary) |
|---|---|---|---|
1 | PCEP + X:31 EP | IN | IN |
2 | PCEP + X:31 | SC | SC |
3 | PCEP + X:31 | Oral | Oral |
4 | PCEP + X:31 | IR | IR |
5 | X:31 | IN | IN |
6 | X:31 | SC | SC |
7 | X:31 | Oral | Oral |
8 | X:31 | IR | IR |