WHO/NREVSS Collaborating Laboratories
National Summary, 2001-2002
Week A(H1N1) & A(H1N2) A(H3N2) A(UNK) B Percent Positive
40 0 4 3 1 0.7
41 0 2 3 0 0.4
42 0 3 4 0 0.5
43 0 7 8 0 1
44 1 6 6 0 0.8
45 0 12 1 0 0.7
46 0 37 7 1 2.3
47 0 25 2 3 1.6
48 0 50 20 1 3.2
49 1 34 42 5 3.7
50 2 39 63 2 4.7
51 3 44 113 3 5.9
52 0 50 166 1 8.7
1 0 108 227 2 9.9
2 2 143 377 6 14.1
3 1 267 625 5 19.7
4 8 378 814 11 21.4
5 3 450 949 20 23.5
6 7 614 933 15 23.4
7 5 610 1115 22 24.4
8 12 533 1166 56 25.7
9 8 384 912 80 23.8
10 6 251 699 125 21.8
11 6 156 450 155 19.3
12 3 103 253 203 16.3
13 3 44 113 265 14.2
14 3 17 65 225 13.3
15 4 17 36 172 11.9
16 6 18 14 206 13.9
17 1 4 6 111 8.1
18 0 10 4 114 9.7
19 1 0 3 106 10
20 1 0 0 49 5.3


Return to Current Report

National Center for Infectious Diseases
Centers for Disease Control and Prevention

Privacy Policy | Accessibility