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| Morphology1 | |||||
| Subtype & Vaccine | Intact Particles | Split Virus | Stellates | 5–20 nm Structures | Indistinct Structures |
| H5N1 | |||||
| Vietnam/04 (SP) | 0 | 1 | 3 | 1 | 4 |
| Indo/05 (SP) | 0 | 1 | 1 | 1 | 4 |
| H7N7 | |||||
| Mallard/00 (SP) | <1 | 0 | 1 | 4 | 2 |
| H9N2 | |||||
| HK/G1/99 (Wyeth) | 1 | 0 | 1 | 3 | 1 |
| CK/G9/97 (Novartis) | 4 | 1 | 2 | 1 | 0 |
| H1N1 | |||||
| Cal/09 Vac (SP) | 0 | 4 | 2 | 2 | 2 |
| Cal/09 Vac (CSL) | 3 | 2 | 1 | 1 | 3 |
Scale of 0 to 4; 0 = none seen, 4 = abundant; <1 = rare.
