Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content

NoroSTAT Data Table

Suspected and Confirmed Norovirus Outbreaks Reported by State Health Departments in Michigan, Minnesota, Ohio, Oregon, South Carolina, Tennessee, and Wisconsin to the National Outbreak Reporting System (NORS) by Week of Illness Onset, 2009-2015*†.

Week Min Range,
2009-12
2012-13 2013-14 2014-15 2015-2016
1-Aug 3 1 6 4 1 6
8-Aug 0 4 9 3 6 9
15-Aug 0 4 3 3 4 6
22-Aug 0 3 5 4 7 3
29-Aug 2 2 3 2 3 3
5-Sep 1 4 2 7 6 4
12-Sep 2 1 7 3 2 3
19-Sep 1 4 6 2 4 7
26-Sep 2 6 6 1 3 3
3-Oct 1 3 3 4 2 7
10-Oct 1 6 3 3 10 5
17-Oct 1 9 9 5 4 12
24-Oct 1 9 13 7 5 7
31-Oct 7 9 18 7 14 16
7-Nov 2 17 22 4 10 7
14-Nov 5 5 16 11 15 9
21-Nov 5 14 26 10 11 7
28-Nov 9 23 42 22 27 19
5-Dec 8 30 35 28 23 25
12-Dec 15 15 24 32 30 20
19-Dec 7 26 31 22 21 12
26-Dec 15 32 35 26 23 6
2-Jan 11 33 30 33 21 39
9-Jan 13 31 39 21 30 40
16-Jan 16 16 35 28 28 34
23-Jan 26 11 43 25 29 34
30-Jan 18 23 41 31 38 23
6-Feb 14 27 21 29 41 39
13-Feb 14 36 42 42 45 33
20-Feb 16 11 34 38 55 30
27-Feb 14 22 50 42 68 31
6-Mar 13 9 39 46 43 26
13-Mar 6 40 27 38 34 17
20-Mar 4 8 33 48 34 27
27-Mar 6 7 33 48 34 32
3-Apr 6 6 30 34 24 22
10-Apr 4 8 19 25 17 22
17-Apr 6 5 19 22 14 16
24-Apr 3 10 13 20 19 13
1-May 8 4 7 13 18 11
8-May 4 10 14 20 15 7
15-May 3 5 8 18 9  
22-May 1 5 7 5 8  
29-May 2 3 4 8 7  
5-Jun 1 3 3 11 6  
12-Jun 4 1 4 5 5  
19-Jun 1 3 4 8 2  
26-Jun 3 3 4 6 5  
3-Jul 3 5 4 4 3  
10-Jul 1 5 10 13 4  
17-Jul 0 6 7 8 7  
24-Jul 1 3 8 4 6  

*Incomplete outbreak data from 2009-12 was supplemented with information from state health department records.

†Michigan and South Carolina joined the NoroSTAT network at the start of the 2015-16 reporting season; 2009-15 data from these states has been added for comparison.

Top