From: Evaluation of the seroprevalence of influenza A(H1N1) 2009 on a university campus: a cross-sectional study
H1N1 Lab Results
< 10
80
26.7%
10
25
8.3%
20
14
4.7%
40
6.7%
44
14.7%
160
42
14.0%
320
≤ 640
27
9.0%
No Results
21
7.0%
No Sample
2
0.7%