Volume 20, Number 8—August 2014
Infection with Possible Precursor of Avian Influenza A(H7N9) Virus in a Child, China, 2013
|Gene segment||GenBank accession no.||Gene clade†||Estimated time of divergence‡|
*PB, polymerase basic subunit; PA, RNA polymerase acidic subunit; HA, hemagglutinin; NP, nucleoprotein; NA, neuraminidase; M, matrix gene; NS, nonstructural gene.
†Defined according to reference (5); ND, not divided: HA, NA, and NS genes were not divided into clades.
‡Calculations based on sequences in Technical Appendix
1These authors contributed equally to this work.
2These authors contributed equally to this work and share senior authorship.