Table 3.
Vaccine | ELISA Antigen | Time since Vaccination | n 2 | Dose (IU) | Immunogenicity in Mice (Log Change) 1 | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Liquid | Lyophilised | ||||||||||
−80 °C | 4 °C | 20 °C | 30 °C | 4 °C | 20 °C | 30 °C | |||||
ChAdOx1 RVF | Gc | 1 month | 24 | 1 × 105 | 0.0 | −0.5 | −0.3 | −0.7 | - | - | - |
24 | 1 × 106 | 0.0 | 0.1 | 0.1 | 0.1 | - | - | - | |||
24 | 1 × 107 | 0.0 | 0.1 | −0.3 | −0.5 | - | - | - | |||
12 months | 18 | 1 × 105 | 0.0 | 0.1 | −1.5 | - | - | - | - | ||
18 | 1 × 106 | 0.0 | −0.2 | −1.1 | - | - | - | - | |||
18 | 1 × 107 | 0.0 | −0.2 | −0.3 | - | - | - | - | |||
16 months | 18 | 1 × 105 | - | - | - | - | 0.0 | −1.6 | −1.6 | ||
18 | 1 × 106 | - | - | - | - | 0.0 | 0.2 | −1.4 | |||
18 | 1 × 107 | - | - | - | - | 0.0 | 0.0 | −0.3 | |||
Gn | 1 month | 24 | 1 × 105 | 0.0 | −0.6 | 0.1 | −0.5 | - | - | - | |
24 | 1 × 106 | 0.0 | 0.7 | 0.6 | −0.4 | - | - | - | |||
24 | 1 × 107 | 0.0 | 0.1 | 0.1 | −0.5 | - | - | - | |||
12 months | 18 | 1 × 105 | 0.0 | −0.2 | −1.7 | - | - | - | - | ||
18 | 1 × 106 | 0.0 | −0.3 | −1.7 | - | - | - | - | |||
18 | 1 × 107 | 0.0 | 0.0 | −0.4 | - | - | - | - | |||
16 months | 18 | 1 × 105 | - | - | - | - | U 3 | U | U | ||
18 | 1 × 106 | - | - | - | - | U | U | U | |||
18 | 1 × 107 | - | - | - | - | 0.0 | −0.2 | −1.4 |
1 Median log change in antibody titre from six mice in each group. Log change for liquid formulations is in relation to vaccine stored at −80 °C. Log change for lyophilised formulations is in relation to vaccine stored at 4 °C. 2 number of mice in total per row (for each temperature, n = 6). Gn and Gc ELISA responses were measured in the same mice, so they do not represent additional animals. 3 U = undetectable antibody response.