Table 1.

Overall weekly test results of NHS Direct callers and individuals suspected of swine flu according to the clinical algorithm in six regions of England, 24 May to 30 June 2009

	Week ending Tuesday 2 June*			Week ending Tuesday 9 June			Week ending Tuesday 16 June			Week ending Tuesday 23 June			Week ending Tuesday 30 June			Five week summary
	x/n	Proportion positive	95% CI	x/n	Proportion positive	95% CI	x/n	Proportion positive	95% CI	x/n	Proportion positive	95% CI	x/n	Proportion positive	95% CI	x/n	Proportion positive	95% CI
Self obtained samples from NHS Direct callers tested by a central laboratory†
Total	0/55	0%	0% to 6%	2/252	1%	0% to 3%	12/346	3%	1% to 6%	30/410	7%	5% to 10%	47/322	15%	11% to 19%	91/1385	7%	5% to 8%
Clinical samples from suspect cases of swine flu tested by Health Protection Agency regional laboratories‡
Under 16s	46/165	38%	21% to 35%	101/379	27%	22% to 31%	466/1072	43%	40% to 46%	1349/2977	45%	44% to 47%	1617/3288	49%	47% to 51%	3579/7881	45%	44% to 47%
16 and over	75/482	16%	12% to 19%	86/772	11%	9% to 14%	263/1742	15%	13% to 17%	863/3966	22%	20% to 23%	1315/4769	28%	26% to 29%	2602/11731	22%	21% to 23%
Total§	124/656	19%	16% to 22%	189/1167	16%	14% to 18%	736/2854	26%	24% to 27%	2248/7062	32%	31% to 33%	2979/8218	36%	35% to 37%	6276/19957	31%	31% to 32%

The following six regions of England were sampled: the North East; the East Midlands; the East of England; the South East; London; and the West Midlands.

Exact binomial confidence intervals have been calculated for all data.

*NHS Direct self sampling initiated on 28 May 2009.

†Results from self obtained samples are by week of self swab.

‡Health Protection Agency regional laboratory results are by week of swab.

§Total includes laboratory results without age of the patient and, therefore, these data are not included within the age breakdown data.