American Academy of Pediatrics

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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.