1917 Avian Influenza Virus Sequences Suggest that the 1918 Pandemic Virus Did Not Acquire Its Hemagglutinin Directly from Birds

MEGA2: molecular evolutionary genetics analysis software

2001 • 6,215 citations

Evolution and ecology of influenza A viruses

1992 • 4,023 citations

The antigenic structure of the influenza virus A/PR/8/34 hemagglutinin (H1 subtype)

1982 • 1,030 citations

Initial Genetic Characterization of the 1918 “Spanish” Influenza Virus

1997 • 706 citations

On the origin of the human influenza virus subtypes H2N2 and H3N2

1978 • 675 citations

Origin and evolution of the 1918 “Spanish” influenza virus hemagglutinin gene

1999 • 600 citations

Sequence of the 1918 pandemic influenza virus nonstructural gene (NS) segment and characterization of recombinant viruses bearing the 1918 NS genes

2001 • 278 citations

Characterization of the 1918 “Spanish” influenza virus neuraminidase gene

2000 • 233 citations

Type-A Influenza Viruses Isolated from Wild Free-Flying Ducks in California

1974 • 211 citations

Optimization of the isolation and amplification of RNA from formalin-fixed, paraffin-embedded tissue: The armed forces institute of pathology experience and literature review*, **

1997 • 160 citations

The antigenicity and evolution of influenza H1 haemagglutinin, from 1950–1957 and 1977–1983: Two pathways from one gene

1986 • 159 citations

Interspecies Transmission of Influenza Viruses

1995 • 95 citations

Influenza Pandemics in Perspective

1977 • 66 citations

Type-A influenza viruses in the feces of migratory waterfowl.

1977 • 35 citations