Table 2.

Temporal pattern of vaccine induced COVID-19 antibody in overall cohort (n = 135).

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	77.2 (19.4–329.4)	512 (114.5–9212)	149 (51.6–2283)	2079 (433.9–8644)
Neutralising antibody (%)	22.1 (8.5–54.2)	52.3 (7.7–92.7)	41.1 (3.8–86.4)	58.6 (17.6–85.1)

Anti-spike antibody titre is expressed as U/mL and neutralising antibody is expressed in percentage. The anti-spike antibody titre value ≥ 0.80 U/mL is considered positive. The specimens with calculated neutralisation ≥ 20% are considered positive for neutralising antibody. Data are expressed as median (inter quartile range).