TABLE 4.
Hemagglutination inhibition assay of A(H1N1)v viruses (2018 to 2019)
| Antigen | Subtype (lineage) | Ferret antisera |
||||||
|---|---|---|---|---|---|---|---|---|
| MI/45 | ID/07 | WI/505 | RG48A | IA/32 | Childa | Adultb | ||
| Reference antigens | ||||||||
| A/Michigan/45/2015 | H1N1 (pdm09) | 5120 | 5120 | 5120 | 20 | <10 | 1280 | 2560 |
| A/Idaho/7/2018 | H1N1 (pdm09) | 5120 | 5120 | 2560 | 10 | <10 | 320 | 640 |
| A/Wisconsin/505/2018 | H1N1 (pdm09) | 5120 | 5120 | 5120 | <10 | <10 | 640 | 1280 |
| A/Ohio/9/2015 IDCDC-RG48A | H1N1v (gamma) | 10 | 10 | 10 | 1280 | <10 | 20 | 160 |
| A/Iowa/32/2016 | H1N2v (delta1) | <10 | <10 | <10 | <10 | 2560 | <10 | 80 |
| Test antigens | ||||||||
| A/Michigan/288/2019 | H1N1v (pdm09) | 5120 | 5120 | 5120 | <10 | <10 | 640 | 640 |
a
2018–2019 postvaccine immune serum pool from child (0 to 3 yrs) vaccinees (A/Michigan/45/2015 vaccine).
b
2018–2019 postvaccine immune serum pool from adult (19 to 49 yrs) vaccinees (A/Michigan/45/2015 vaccine).