Figure.

Number of tweets, by group subsample over time, indicating the day with the most tweets for each group, study of twitter messages related to the human papillomavirus vaccine, August 2014-July 2015.

Date Created	Type of Tweet, No.
	Health Professional User	Health Professional to Parent	Parent Audience
1-Aug-14	43	1	32
2-Aug-14	38	1	14
3-Aug-14	35	2	62
4-Aug-14	43	0	133
5-Aug-14	103	8	63
6-Aug-14	46	1	38
7-Aug-14	71	2	30
8-Aug-14	39	4	30
9-Aug-14	38	0	20
10-Aug-14	41	1	31
11-Aug-14	46	1	39
12-Aug-14	72	5	56
13-Aug-14	50	5	36
14-Aug-14	33	7	39
15-Aug-14	25	0	122
16-Aug-14	19	2	57
17-Aug-14	15	1	76
18-Aug-14	111	2	154
19-Aug-14	109	2	107
20-Aug-14	108	10	82
21-Aug-14	73	4	57
22-Aug-14	57	4	16
23-Aug-14	39	1	19
24-Aug-14	19	0	23
25-Aug-14	50	4	31
26-Aug-14	53	3	62
27-Aug-14	41	0	28
28-Aug-14	47	7	110
29-Aug-14	34	5	63
30-Aug-14	22	2	59
31-Aug-14	25	2	28
1-Sep-14	38	6	39
2-Sep-14	24	1	11
3-Sep-14	18	2	36
4-Sep-14	50	0	46
5-Sep-14	66	0	27
6-Sep-14	28	2	36
7-Sep-14	23	4	20
8-Sep-14	61	1	76
9-Sep-14	97	10	68
10-Sep-14	116	3	53
11-Sep-14	107	31	126
12-Sep-14	30	3	37
13-Sep-14	33	0	21
14-Sep-14	30	1	10
15-Sep-14	62	6	47
16-Sep-14	86	1	73
17-Sep-14	150	6	49
18-Sep-14	106	2	30
19-Sep-14	59	3	24
20-Sep-14	62	6	25
21-Sep-14	68	4	34
22-Sep-14	160	7	63
23-Sep-14	63	4	68
24-Sep-14	54	4	70
25-Sep-14	59	6	40
26-Sep-14	36	3	29
27-Sep-14	48	2	20
28-Sep-14	25	0	23
29-Sep-14	39	5	36
30-Sep-14	54	7	61
1-Oct-14	87	4	39
2-Oct-14	61	0	37
3-Oct-14	45	1	54
4-Oct-14	23	1	8
5-Oct-14	30	2	28
6-Oct-14	54	1	36
7-Oct-14	190	6	37
8-Oct-14	145	4	156
9-Oct-14	40	1	38
10-Oct-14	18	3	37
11-Oct-14	44	3	26
12-Oct-14	33	1	6
13-Oct-14	52	4	70
14-Oct-14	53	0	15
15-Oct-14	51	1	36
16-Oct-14	35	2	38
17-Oct-14	23	2	61
18-Oct-14	17	1	21
19-Oct-14	29	0	33
20-Oct-14	79	0	38
21-Oct-14	39	1	27
22-Oct-14	40	1	60
23-Oct-14	30	1	42
24-Oct-14	38	5	30
25-Oct-14	23	0	28
26-Oct-14	20	4	18
27-Oct-14	22	0	13
28-Oct-14	30	1	17
29-Oct-14	68	3	26
30-Oct-14	46	2	43
31-Oct-14	42	0	28
1-Nov-14	33	1	21
2-Nov-14	18	0	8
3-Nov-14	37	0	16
4-Nov-14	23	2	11
5-Nov-14	62	0	49
6-Nov-14	80	7	35
7-Nov-14	69	8	68
8-Nov-14	30	3	38
9-Nov-14	38	7	21
10-Nov-14	96	5	34
11-Nov-14	93	3	16
12-Nov-14	122	2	23
13-Nov-14	98	18	126
14-Nov-14	50	7	62
15-Nov-14	42	0	14
16-Nov-14	28	1	50
17-Nov-14	67	6	57
18-Nov-14	75	4	39
19-Nov-14	77	3	26
20-Nov-14	75	13	136
21-Nov-14	56	3	28
22-Nov-14	30	0	32
23-Nov-14	42	3	30
24-Nov-14	40	3	29
25-Nov-14	33	8	28
26-Nov-14	19	2	45
27-Nov-14	9	1	53
28-Nov-14	15	2	9
29-Nov-14	7	4	9
30-Nov-14	7	0	3
1-Dec-14	14	0	3
2-Dec-14	15	1	17
3-Dec-14	132	0	27
4-Dec-14	116	5	62
5-Dec-14	43	1	111
6-Dec-14	20	2	20
7-Dec-14	49	6	30
8-Dec-14	117	3	23
9-Dec-14	96	8	86
10-Dec-14	134	2	55
11-Dec-14	205	5	68
12-Dec-14	0	0	0
13-Dec-14	0	0	0
14-Dec-14	0	0	0
15-Dec-14	0	0	0
16-Dec-14	0	0	0
17-Dec-14	0	0	0
18-Dec-14	0	0	0
19-Dec-14	0	0	0
20-Dec-14	0	0	0
21-Dec-14	0	0	0
22-Dec-14	0	0	0
23-Dec-14	0	0	0
24-Dec-14	0	0	0
25-Dec-14	0	0	0
26-Dec-14	0	0	0
27-Dec-14	0	0	0
28-Dec-14	0	0	0
29-Dec-14	0	0	0
30-Dec-14	0	0	0
31-Dec-14	36	5	42
1-Jan-15	32	1	11
2-Jan-15	49	10	37
3-Jan-15	33	8	31
4-Jan-15	27	2	12
5-Jan-15	30	4	17
6-Jan-15	89	14	69
7-Jan-15	146	8	54
8-Jan-15	132	4	89
9-Jan-15	147	5	91
10-Jan-15	65	1	34
11-Jan-15	36	3	30
12-Jan-15	62	3	60
13-Jan-15	72	2	39
14-Jan-15	92	7	37
15-Jan-15	84	7	90
16-Jan-15	111	5	81
17-Jan-15	68	3	41
18-Jan-15	39	0	30
19-Jan-15	43	4	36
20-Jan-15	90	12	89
21-Jan-15	75	7	106
22-Jan-15	178	39	412
23-Jan-15	71	3	76
24-Jan-15	58	20	275
25-Jan-15	78	4	71
26-Jan-15	76	5	68
27-Jan-15	76	2	75
28-Jan-15	92	26	171
29-Jan-15	45	8	48
30-Jan-15	37	2	19
31-Jan-15	12	1	23
1-Feb-15	22	1	35
2-Feb-15	62	7	165
3-Feb-15	98	10	139
4-Feb-15	127	28	494
5-Feb-15	83	11	92
6-Feb-15	105	7	95
7-Feb-15	67	1	25
8-Feb-15	100	0	63
9-Feb-15	165	2	51
10-Feb-15	196	3	66
11-Feb-15	90	8	158
12-Feb-15	102	3	107
13-Feb-15	44	5	32
14-Feb-15	41	1	50
15-Feb-15	58	0	22
16-Feb-15	57	1	27
17-Feb-15	129	5	24
18-Feb-15	99	0	24
19-Feb-15	170	2	95
20-Feb-15	74	2	54
21-Feb-15	146	4	91
22-Feb-15	70	1	60
23-Feb-15	98	3	27
24-Feb-15	102	14	66
25-Feb-15	80	4	67
26-Feb-15	65	8	82
27-Feb-15	68	4	62
28-Feb-15	35	1	29
1-Mar-15	23	0	29
2-Mar-15	70	2	33
3-Mar-15	65	4	39
4-Mar-15	67	3	54
5-Mar-15	80	3	27
6-Mar-15	109	3	80
7-Mar-15	44	0	24
8-Mar-15	58	4	25
9-Mar-15	85	6	29
10-Mar-15	83	3	30
11-Mar-15	100	1	35
12-Mar-15	78	5	62
13-Mar-15	65	0	19
14-Mar-15	77	1	31
15-Mar-15	35	0	21
16-Mar-15	55	1	25
17-Mar-15	33	2	32
18-Mar-15	16	8	18
19-Mar-15	0	0	0
20-Mar-15	0	0	0
21-Mar-15	0	0	0
22-Mar-15	0	0	0
23-Mar-15	43	2	15
24-Mar-15	40	9	60
25-Mar-15	97	7	87
26-Mar-15	77	4	37
27-Mar-15	34	2	126
28-Mar-15	39	0	19
29-Mar-15	44	1	109
30-Mar-15	35	7	278
31-Mar-15	50	2	44
1-Apr-15	78	4	182
2-Apr-15	167	13	130
3-Apr-15	43	5	23
4-Apr-15	46	1	17
5-Apr-15	44	10	40
6-Apr-15	47	0	25
7-Apr-15	47	23	150
8-Apr-15	34	2	63
9-Apr-15	35	5	70
10-Apr-15	61	2	21
11-Apr-15	24	0	18
12-Apr-15	22	2	33
13-Apr-15	381	10	83
14-Apr-15	186	3	42
15-Apr-15	132	1	36
16-Apr-15	52	0	114
17-Apr-15	44	1	74
18-Apr-15	22	0	30
19-Apr-15	21	1	32
20-Apr-15	79	2	69
21-Apr-15	136	11	99
22-Apr-15	135	1	90
23-Apr-15	153	8	57
24-Apr-15	133	32	141
25-Apr-15	41	2	26
26-Apr-15	50	0	17
27-Apr-15	178	5	50
28-Apr-15	75	1	32
29-Apr-15	102	1	57
30-Apr-15	110	3	36
1-May–15	76	2	33
2-May–15	25	0	21
3-May–15	32	2	25
4-May–15	63	2	23
5-May–15	63	3	31
6-May–15	75	18	136
7-May–15	62	4	46
8-May–15	56	15	45
9-May–15	26	5	20
10-May–15	37	3	18
11-May–15	49	1	25
12-May–15	111	3	27
13-May–15	255	2	19
14-May–15	74	2	24
15-May–15	61	0	9
16-May–15	23	0	4
17-May–15	26	0	27
18-May–15	43	1	49
19-May–15	20	1	19
20-May–15	54	10	101
21-May–15	27	1	9
22-May–15	43	21	59
23-May–15	5	0	4
24-May–15	3	1	2
25-May–15	18	0	4
26-May–15	11	0	16
27-May–15	14	0	8
28-May–15	19	1	9
29-May–15	17	0	17
30-May–15	16	0	11
31-May–15	18	2	14
1-Jun-15	33	1	17
2-Jun-15	63	1	20
3-Jun-15	53	9	34
4-Jun-15	54	6	54
5-Jun-15	49	0	34
6-Jun-15	46	3	21
7-Jun-15	45	1	16
8-Jun-15	35	6	72
9-Jun-15	53	6	89
10-Jun-15	332	6	90
11-Jun-15	102	5	51
12-Jun-15	38	4	32
13-Jun-15	0	0	0
14-Jun-15	0	0	0
15-Jun-15	0	0	0
16-Jun-15	0	0	0
17-Jun-15	0	0	0
18-Jun-15	0	0	0
19-Jun-15	0	0	0
20-Jun-15	0	0	0
21-Jun-15	5	0	4
22-Jun-15	93	3	42
23-Jun-15	88	1	270
24-Jun-15	54	0	95
25-Jun-15	81	6	49
26-Jun-15	47	0	105
27-Jun-15	34	2	68
28-Jun-15	36	1	19
29-Jun-15	45	1	14
30-Jun-15	64	0	23
1-Jul-15	50	5	227
2-Jul-15	86	5	29
3-Jul-15	36	4	20
4-Jul-15	26	0	14
5-Jul-15	32	3	69
6-Jul-15	48	2	53
7-Jul-15	51	2	77
8-Jul-15	64	3	36
9-Jul-15	50	1	60
10-Jul-15	62	3	59
11-Jul-15	30	1	30
12-Jul-15	31	1	36
13-Jul-15	114	4	41
14-Jul-15	100	4	39
15-Jul-15	64	1	21
16-Jul-15	53	0	33
17-Jul-15	63	1	10
18-Jul-15	21	0	25
19-Jul-15	19	1	44
20-Jul-15	49	5	32
21-Jul-15	47	0	22
22-Jul-15	72	4	32
23-Jul-15	86	9	57
24-Jul-15	51	2	16
25-Jul-15	38	3	36
26-Jul-15	28	0	14
27-Jul-15	41	1	15
28-Jul-15	75	6	47
29-Jul-15	32	1	13
Total	20,821	1,245	16,971
Percentage	5.98		7.34