Table 1.

Population characteristics

	Sept 2021	Dec 2021	Feb 2022
Donors tested	2081	2121	2206
Female (%)	1007 (48)	989 (47)	990 (45)
Age-group (%)
18–25	130 (6)	136 (6)	187 (9)
26–35	270 (13)	246 (12)	251 (11)
36–45	344 (17)	318 (15)	284 (13)
46–55	444 (21)	483 (23)	436 (20)
56–65	437 (21)	469 (22)	525 (24)
66–75	456 (22)	469 (22)	523 (24)
Region (%)
North	480 (23)	495 (23)	505 (23)
Mid-East	223 (11)	286 (14)	271 (12)
Mid-West	391 (19)	414 (20)	410 (19)
South-East	501 (24)	473 (22)	506 (23)
South-West	485 (23)	453 (21)	514 (23)
Antibody status (%) *
Only vaccinated	1565 (75)	1603 (76)	1413 (64)
Infected (+/- vaccinated)	419 (20)	461 (22)	755 (32)
Negative	97 (5)	57 (3)	38 (2)

^*Based on RBD and/or NC antibody response