Volume 27, Number 12—December 2021
Research Letter
Reassortant Influenza A(H1N1)pdm09 Virus in Elderly Woman, Denmark, January 2021
Jakob N. Nissen, Sophie J. George, Charlotte K. Hjulsager, Jesper S. Krog, Xiaohui C. Nielsen, Tina V. Madsen, Klara M. Andersen, Tyra G. Krause, Lasse S. Vestergaard, Lars E. Larsen, and Ramona Trebbien
Table
Percentage identity similarity between gene and protein segments of influenza virus isolate A/Denmark/1/2021 (vH1N1) from a patient in Denmark and reference viruses from GISAID*
| A/Denmark/1/2021 (vH1N1) segment | Identity, % |
|||
|---|---|---|---|---|
| A/swine/Luedinghausen/ 21728/2015† | A/California/07/2009‡ | A/Guangdong-Maonan/SWL1536/2019¶ | A/swine/Denmark/ 3797–4/2020§ |
|
| Amino acid | ||||
| PB2 | 98.7 | 97.5 | 97.6 | 100 |
| PB1 | 99.5 | 99.3 | 98.7 | 99.9 |
| PA | 98.9 | 98.0 | 98.3 | 99.6 |
| PA-X | 98.7 | 97.4 | 97.0 | 99.6 |
| HA | 97.3 | 92.0 | 91.9 | 99.3 |
| NP | 99.0 | 99.0 | 98.2 | 100 |
| NA | 97.9 | 95.1 | 91.9 | 99.8 |
| M1 | 98.8 | 98.4 | 97.6 | 100 |
| M2 | 96.9 | 96.9 | 93.8 | 100 |
| NS1 | 76.5 | 77.4 | 74.7 | 99.5 |
| NEP |
85.1 |
86.0 |
85.1 |
99.2 |
| Nucleotide | ||||
| PB2 | 98.0 | 96.1 | 94.7 | 99.8 |
| PB1 | 96.8 | 95.9 | 93.8 | 99.2 |
| PA | 98.0 | 96.7 | 95.4 | 99.4 |
| HA | 97.3 | 94.4 | 93.0 | 99.4 |
| NP | 97.4 | 96.4 | 94.5 | 99.4 |
| NA | 97.4 | 96.1 | 93.7 | 99.5 |
| MP | 97.8 | 97.4 | 95.9 | 99.9 |
| NS | 80.2 | 80.3 | 80.3 | 99.8 |
*GISIAD, https://www.gisaid.org. PB1/PB2, polymerase basic protein 1/2; PA, polymerase acidic protein; HA, hemagglutinin; NP, nucleoprotein; NA, neuraminidase; MP/M1/M2, matrix protein 1/2, NS/NS1; nonstructural protein; NEP, nuclear export protein †GISAID accession no. EPI_ISL_504870. ‡GISAID accession no EPI_ISL_227813. ¶GISAID accession no. EPI_ISL_377080. §GISAID accession no. EPI_ISL_1673668.
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