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SARS antibody titer determined by ELISA, IFA, and neutralizing antibody test
| ELISA titer | IFA titer | Neutralizing antibody titer | |
|---|---|---|---|
| SARS antibody reference* | 1:40 | 1:1280 | 1:128 |
| SARS hyperimmune globulins | 1:83 | 1:1600 | 1:200 |
Reference for the ELISA and neutralizing antibody test was a hyperimmune globulin preparation used by the NICPBP, and reference for the IFA was a convalescent plasma sample preparation provided by Dr J.S. Tam.
