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Monthly distribution of H1 and H3 samples tested
| Month, year | H1 tested, n | H3 tested, n |
|---|---|---|
| January, 2007 | 3 | 24 |
| February, 2007 | 1 | 13 |
| March, 2007 | 1 | 54 |
| April, 2007 | 0 | 11 |
| June, 2007 | 1 | 1 |
| July, 2007 | 1 | 1 |
| October, 2007 | 0 | 1 |
| November, 2007 | 0 | 4 |
| December, 2007 | 2 | 7 |
| January, 2008 | 15 | 13 |
| February, 2008 | 5 | 13 |
| March, 2008 | 2 | 24 |
| April, 2008 | 2 | 16 |
| May, 2008 | 1 | 10 |
| August, 2008 | 0 | 1 |
