. 2021 Dec 26;28:e00261. doi: 10.1016/j.plabm.2021.e00261

Table 1.

Summary of SARS-CoV-2 antibody test post-vaccination in TCH employees.

	Number	Percentage
Total Antibody Tests	3266	100
Total Positive Response	3244	99.4
Total Negative Response	21	0.6
Subsequently had a positive Ab response after another vaccine dose	6	28.6^a
On immunosuppressive therapy/biologics	14	66.7^a
No obvious reason for negative response	2	10.5^a

Percentage within the 21 non-responders.