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  1. Lot Release

Influenza Virus Vaccine for the 2018-2019 Season

Cumulative 2018/2019 Season Lot Release Status (Updated 11/20/2018)

Flu vaccine lots that have been released by FDA and are available for distribution by the manufacturers. For information on flu vaccine distribution schedules, please contact the manufacturers directly.

Manufacturer Total Number of Lots Released by FDA
Seqirus Pty. Ltd.
Afluria Quadrivalent
Seqirus Pty. Ltd.
Seqirus, Inc.
Fluarix Quadrivalent
GlaxoSmithKline Biologicals
Flucelvax Quadrivalent
Seqirus, Inc.
Flublok Quadrivalent
Protein Sciences Corporation
FluLaval Quadrivalent
ID Biomedical Corporation of Quebec
FluMist Quadrivalent
MedImmune, LLC
Fluzone High Dose
Sanofi Pasteur, Inc.
Fluzone Quadrivalent
Sanofi Pasteur, Inc.

FDA's Vaccines and Related Biological Products Advisory Committee (VRBPAC) met in Silver Spring, Maryland, on March 1, 2018, to select the influenza viruses for the composition of the influenza vaccine for the 2018-2019 U.S. influenza season. During this meeting, the advisory committee reviewed and evaluated the surveillance data related to epidemiology and antigenic characteristics of recent influenza isolates, serological responses to 2017-2018 vaccines, and the availability of candidate strains and reagents.

The committee recommended that the trivalent formulation influenza vaccines for the U.S. 2018-2019 influenza season contain the following:

  • an A/Michigan/45/2015 (H1N1) pdm09-like virus
  • an A/Singapore/INFIMH-16–0019/2016 (H3N2)-like virus
  • a B/Colorado/06/2017-like virus (B/Victoria lineage).

The committee also recommended that quadrivalent influenza vaccines contain the above three strains and the following additional B strain:

  • a B/Phuket/3073/2013-like virus (B/Yamagata lineage)


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