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Reassortant vaccine strains used in clinical trials of pandemic vaccines [18].
| Virus strain | Subtype |
|---|---|
| A/Singapore/1/57 | H2N2 |
| A/duck/Singapore/97 | H5N1 |
| A/Viet Nam/1194/2004 (NIBRG-14), clade 1 | H5N1 |
| A/Indonesia/5/2005, clade 2.1 | H5N1 |
| A/duck/Potsdam/88/92 (H5N2) × A/Leningrad/134/17/57 (H2N2) | H5N2 (live) |
| A/chicken/Italy H7N1×PR8 (RD-3) | H7N1 |
| A/chicken/British Columbia/CN-6/2004 | H7N3 |
| A/Hong Kong/1073/99 | H9N2 |
| A/chicken/HongKong/G9/97 (H9N2) × A/AnnArbor/6/60 (H2N2) | H9N2 (live) |
