Table 1. Viruses of A/California/07/2009 vaccines, and A/PR/8/34 and wild type A/California/07/2009 viruses used for deep sequencing analysis.
Note: CBER: Center for Biologics Evaluation and Research at US Food and Drug Administration.
| Sample code | Reference and Derivation | Number of passages on eggs |
|---|---|---|
| X-181 | X-181 | 1 |
| X-181-M1 | X-181 | 9 |
| X-181-M2 | X-181 | 9 |
| X181-M3 | X-181 | 13 |
| X-181-M4 | X-181 | 10 |
| X-179A | X-179A | 1 |
| X-179A-M1 | X-179A | 10 |
| X-179A-M2 | X-179A | 11 |
| X-179A-M3 | X-179A | 12 |
| X-179A-M4 | X-179A | 11 |
| X-179A-M5 | X-179A | 13 |
| 121XP-M4 | 121XP | 10 |
| A/Ca/07/2009 | A/California/07/2009 | 1 |
| A/PR/8/34 (CBER) | A/Puerto Rico/08/34 | 1 |
| A/PR/8/34-1* | A/Puerto Rico/08/34 | 14 |
| A/PR/8/34-3* | A/Puerto Rico/08/34 | 14 |
*: A/PR/8/34 virus stock was passaged 13 times in eggs, and the last passaged virus was passaged one time (passage 14) separately in 2 different eggs, the 2 harvested viruses are designated as A/PR/8/34-1 and A/PR/8/34-3.