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ELISA and neutralizing assays were performed to determine antibody titres as described in Methods. E-gp antibodies were removed from adsorbed IVIG as described in Methods.
| IVIG preparation | WNV antibody titre (ELISA) | WNV E-gp titre (ELISA) | Neutralizing antibody titre |
| IVIG | 1 : 250 | 1 : 250 | 1/80 |
| Adsorbed IVIG | 1 : 50 | <1 : 10 | <1/20 |
| WNV-IVIG | 1 : 250 | 1 : 6250 | 1/80 |
