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Novel Vaccines

Safety and immunogenicity of three dose levels of an investigational, highly purified Vero cell rabies vaccine: A randomized, controlled, observer-blinded, Phase II study with a simulated post-exposure regimen in healthy adults

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Article: 2275453 | Received 19 May 2023, Accepted 21 Oct 2023, Published online: 03 Nov 2023

Figures & data

Figure 1. Participant flow from visits 1–8 for all groups.

aParticipant received HDCV instead of PVRV-NG.
bOne participant missed Visit 5.
AE, adverse events; D, study day; FU, follow-up; M7, study month 7 (6 months after the final injection).
Figure 1. Participant flow from visits 1–8 for all groups.

Table 1. Baseline characteristics for the full analysis set (N = 320).

Figure 2. Post-vaccination geometric mean rabies virus neutralizing antibody (RVNA), determined by RFFIT (modified full analysis set).

Modified full analysis set defined post hoc as excluding seven participants with a baseline RVNA titer ≥0.5 IU/mL and considering only those with a baseline RVNA titer <0.5 IU/mL.
D, day; GMT, Geometric mean titers; M, month; RFFIT, rapid fluorescent focus inhibition test; RVNA, rabies virus neutralizing antibody.
Error bars are 95% confidence intervals.
Figure 2. Post-vaccination geometric mean rabies virus neutralizing antibody (RVNA), determined by RFFIT (modified full analysis set).

Table 2. Immunogenicity summary of RVNA titers and GMTs on D14, 28, and 42 (per protocol analysis set).

Table 3. Ratio of geometric mean titer (GMT) between groups on D14, 28, and 42 (modified full analysis set).

Figure 3. Post-vaccination: rabies virus neutralizing antibody (RVNA) titers determined by RFFIT≥0.5 IU/mL (per-protocol analysis set).

Per protocol analysis set is a subset of the full analysis set, which is defined based on the D14 timepoint; all participants had baseline RVNA of <0.2 IU/mL at D0.
D, day; RFFIT, rapid fluorescent focus inhibition test; RVNA, rabies virus neutralizing antibody.
Error bars are 95% confidence intervals.
Figure 3. Post-vaccination: rabies virus neutralizing antibody (RVNA) titers determined by RFFIT≥0.5 IU/mL (per-protocol analysis set).

Table 4. Immunogenicity summary of RVNA titers 6 months after the final injection in participants with a baseline titer <0.5 IU/mL (modified full analysis set).

Table 5. Number of patients with determined virus neutralization results and achieving complete neutralization at 1:5 dilution in RFFIT (per-protocol analysis set).

Table 6. Safety profile of low-, medium-, and high-doses of PVRV-NG2, PVRV-NG, or HDCV for solicited and unsolicited reactions (safety analysis set).

Data availability statement

Qualified researchers may request access to patient-level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient-level data will be anonymized, and study documents will be redacted to protect the privacy of study participants. Further details on Sanofi’s data-sharing criteria, eligible studies, and process for requesting access can be found at: https://www.vivli.org/.