Table.

Demographic and clinical characteristics of study participants

		0–4 years of age				5–11 years of age
		Number of children	Infections	Hospitalisations	Deaths	Number of children	Infections	Hospitalisations	Deaths
Total		481 528	127 211	691	5	887 193	257 592	426	10
	Unvaccinated	430 698				584 707
	Before authorisation		90 221	509	4		76 619	176	4
	After authorisation		27 449	161	1		116 108	141	5
	Vaccinated	50 830				302 486
	Before authorisation		7447	15	0		22 381	57	0
	After authorisation		2094	6	0		42 484	52	1
One dose only		11 235				39 261
	Before first dose		2083	6	0		5372	9	0
	After first dose		159	0	0		3319	3	0
Two doses only		28 066				216 330
	Before second dose		4913	8	0		28 550	56	0
	After second dose		341	1	0		18 132	26	1
Three doses		11 529				46 895
	Before third dose		1966	6	0		8584	14	0
	After third dose		79	0	0		908	1	0
Sex
	Female	235 838	60 859	308	4	434 917	125 552	199	4
	Male	245 690	66 352	383	1	452 276	132 040	227	6
Race and ethnicity
	Black or Hispanic	206 120	49 191	333	1	369 667	98 221	191	4
	Other	275 408	78 020	358	4	517 526	159 371	235	6
Geographical region
	Coastal plain	139 930	34 034	205	0	250 132	69 609	117	1
	Piedmont	299 124	83 002	441	5	557 837	165 417	264	8
	Mountain	42 474	10 175	45	0	79 224	22 566	45	1
County vaccination
	<62%	165 702	41 659	270	1	299 029	83 985	152	1
	62–75%	143 831	37 474	234	1	274 978	78 769	149	5
	>75%	171 995	48 078	187	3	313 186	94 838	125	4