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TABLE 1

Quadrivalent Influenza Vaccine Composition for the 2022–2023 Season

Specific Strain
Influenza A  
 H1N1 A/Victoria/2570/2019 (H1N1) pdm09-like virus; (egg-based)a 
 A/Wisconsin/588/2019 (H1N1) pdm09-like virus; (cell culture-based or recombinant)a 
 H3N2 A/Darwin/9/2021 (H3N2)-like virus; (egg-based)b A/Darwin/6/2021 (H3N2)-like virus; (cell culture-based or recombinant)b 
Influenza B  
 Victoria B/Austria/1359417/2021-like virus; (B/Victoria lineage)b 
 Yamagata B/Phuket/3073/2013-like virus (B/Yamagata lineage)a 
Specific Strain
Influenza A  
 H1N1 A/Victoria/2570/2019 (H1N1) pdm09-like virus; (egg-based)a 
 A/Wisconsin/588/2019 (H1N1) pdm09-like virus; (cell culture-based or recombinant)a 
 H3N2 A/Darwin/9/2021 (H3N2)-like virus; (egg-based)b A/Darwin/6/2021 (H3N2)-like virus; (cell culture-based or recombinant)b 
Influenza B  
 Victoria B/Austria/1359417/2021-like virus; (B/Victoria lineage)b 
 Yamagata B/Phuket/3073/2013-like virus (B/Yamagata lineage)a 

Trivalent vaccines (not available in United States) do not include the B/Yamagata component.

a

Unchanged this season.

b

New this season.

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