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Table 2 Frequency distribution of MN titers for SST

From: Influence of sample collection tube method, anticoagulant-containing plasma versus serum, on influenza virus hemagglutination inhibition titer and microneutralization titer serological assays

SST Titer

Type A, H1N1

Type B

< 40

2

1

40 - < 80

2

3

80 - < 160

5

3

160 - < 320

7

6

320 - < 640

9

5

640 - < 1280

4

6

1280

1

6