Table A1.

Number of samples tested and percentage of samples positive for anti-N and anti-S (weighted and adjusted for test sensitivity and specificity).

	Samples Tested	Anti-N Positive		Anti-S Positive
	Number	%	95% CI	%	95% CI
September 2021	9363	4.38	3.96, 4.81	97.03	96.62, 97.44
October 2021	9627	4.26	3.85, 4.68	98.01	97.65, 98.36
November 2021	9018	5.04	4.58, 5.50	98.52	98.18, 98.86
December 2021	16,817	6.39	6.01, 6.76	98.58	98.34, 98.82
January 2022	32,505	12.12	11.76, 12.48	98.89	98.73, 99.06
February 2022	28,616	23.68	23.18, 24.18	99.60	99.45, 99.75
March 2022	26,057	28.71	28.16, 29.26	99.57	99.42, 99.73
April 2022	29,787	36.71	36.16, 37.26	99.74	99.60, 99.88
May 2022	31,764	46.32	45.77, 46.87	100.00	100.00, 100.00
June 2022	32,121	50.70	50.15, 51.26	100.00	100.00, 100.00