Table 4. Percent of individuals with antisera with HAI activity that recognized more, fewer, or similar number of strains in the panel post-vaccination compared to pre-challenge.
| Year-Subtype | ≤ 2* | Similar | ≥ 2* | Year-Subtype | ≤ 2 | Similar | ≥ 2 | |
|---|---|---|---|---|---|---|---|---|
| Age | 2014-H1N1 | 2014-H3N2 | ||||||
| 18–34 | 18% | 67% | 15% | 13% | 87% | 0% | ||
| 35–49 | 32% | 68% | 0% | 60% | 37% | 3% | ||
| 50–64 | 44% | 56% | 0% | 61% | 36% | 3% | ||
| 65–85 | 42% | 55% | 2% | 59% | 40% | 1% | ||
| 2015-H1N1 | 2015-H3N2 | |||||||
| 18–34 | 13% | 73% | 15% | 37% | 47% | 16% | ||
| 35–49 | 26% | 46% | 22% | 50% | 48% | 2% | ||
| 50–64 | 37% | 55% | 8% | 61% | 34% | 5% | ||
| 65–85 | 39% | 55% | 6% | 66% | 28% | 6% | ||
| 2016-H1N1 | 2016-H3N2 | |||||||
| 18–34 | 33% | 68% | 0% | 28% | 72% | 0% | ||
| 35–49 | 59% | 38% | 3% | 44% | 56% | 0% | ||
| 50–64 | 35% | 65% | 0% | 48% | 52% | 0% | ||
| 65–85 | 35% | 62% | 3% | 53% | 47% | 0% |
*≥2 or more = Antisera detects 2 or more viruses post-vaccination compared to pre-vaccination in the HAI assay in the panel
Similar = Antisera detects 1 more, the same, or 1 fewer virus post-vaccination compared to pre-vaccination in the HAI assay in the panel post-vaccination
≤2 or fewer = Antisera detects 2 or fewer viruses post-vaccination compared to pre-vaccination in the HAI assay in the panel