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Proportion of participants, without anti-spike antibody before vaccination, who developed COVID-19 antibody after vaccination (n = 99).
| COVID-19 Antibody | Time of Specimen Collection (Days) | |||
|---|---|---|---|---|
| After the First Dose | 60 Days after Second Dose | 150 Days after Second Dose | 270 Days after Second Dose | |
| Anti-Spike antibody (%) | 94 (95) | 99 (100) | 99 (100) | 99 (100) |
| Neutralising antibody (%) | 46 (46.5) | 61 (61.6) | 54 (54.5) | 73 (73.4) |
