Lot number lookup
Flu vaccine lot number lookup
923 flu vaccine lots with VAERS reports · 28,325 reports · 6,676 serious · 94 with a death outcome · manufacturers: Csl Limited, FLUX, Glaxosmithkline Biologicals, Medimmune Vaccines, Inc., Novartis Vaccines And Diagnostics, Sanofi Pasteur, Seqirus, Inc.
Read this first. A report count is not a rate. Lots differ in size and in how long they were in use; VAERS has no denominator unless shipment data is known. A report does not establish that the vaccine caused the event.
Flu vaccine lots ranked by VAERS report count
Top 60 of 923 lots. Click a lot to open it in the lot explorer (symptom mix, timeline, reporting rate where a denominator exists).
| Lot | Manufacturer | Reports | Serious | Deaths | Doses (known) | Reports / M doses | First → last report |
|---|---|---|---|---|---|---|---|
| NOBATCHNUMBER | FLUX | 259 | 27 | 2 | – | – | 2018-02-11 → 2024-12-13 |
| 145701 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 230 | 1 | – | – | – | 2014-11-06 → 2016-02-11 |
| 1514501 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 137 | 7 | – | – | – | 2015-08-17 → 2017-02-27 |
| 1515701 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 128 | 2 | – | – | – | 2015-10-14 → 2017-01-26 |
| Z7275 | Influenza (quadrivalent) — Glaxosmithkline Biologicals | 122 | – | – | – | – | 2020-09-22 → 2021-10-16 |
| 500568P | Influenza nasal (trivalent) — Medimmune Vaccines, Inc. | 113 | 2 | – | – | – | 2008-10-24 → 2009-08-31 |
| 14511P | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 101 | 2 | – | – | – | 2014-09-18 → 2016-02-11 |
| 500501P | Influenza nasal (trivalent) — Medimmune Vaccines, Inc. | 91 | 4 | – | – | – | 2007-12-26 → 2009-08-13 |
| 5RS7Z | Influenza (quadrivalent) — Glaxosmithkline Biologicals | 89 | – | – | – | – | 2019-10-18 → 2020-02-19 |
| U4713AA | Influenza (trivalent) — Sanofi Pasteur | 88 | 24 | 1 | – | – | 2013-08-20 → 2015-01-26 |
| 111774P1 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 85 | 26 | – | – | – | 2010-08-19 → 2014-06-06 |
| 14649211A | Influenza (trivalent) — Csl Limited | 84 | – | – | – | – | 2017-09-21 → 2018-06-21 |
| AFLUA3508A | Influenza (trivalent) — Glaxosmithkline Biologicals | 81 | 2 | – | – | – | 2008-11-03 → 2010-07-02 |
| U5041BA | Influenza (trivalent) — Sanofi Pasteur | 81 | 18 | – | – | – | 2014-10-01 → 2015-12-02 |
| UT7683NA | Influenza (quadrivalent) — Sanofi Pasteur | 79 | – | – | – | – | 2022-10-04 → 2023-03-29 |
| U3599AA | Influenza (trivalent) — Sanofi Pasteur | 74 | 18 | – | – | – | 2010-09-03 → 2011-05-05 |
| 11049221A | Influenza (trivalent) — Csl Limited | 73 | 71 | – | – | – | 2015-11-11 → 2016-06-06 |
| U4714AA | Influenza (trivalent) — Sanofi Pasteur | 73 | 29 | – | – | – | 2013-09-05 → 2015-08-07 |
| U5024CA | Influenza (trivalent) — Sanofi Pasteur | 73 | 15 | 2 | – | – | 2014-09-22 → 2015-12-04 |
| WT54306 | Influenza (trivalent) — Csl Limited | 73 | 1 | – | – | – | 2016-12-15 → 2017-05-25 |
| 111775P1 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 72 | 20 | – | – | – | 2010-08-25 → 2011-10-14 |
| 1100201 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 70 | 25 | 2 | – | – | 2011-08-05 → 2013-02-07 |
| P100359452 | Influenza (quadrivalent) — Seqirus, Inc. | 69 | – | – | – | – | 2021-11-12 → 2022-09-30 |
| UI808AA | Influenza (trivalent) — Sanofi Pasteur | 67 | 11 | 2 | – | – | 2017-08-15 → 2018-01-03 |
| 97839P2 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 66 | 21 | – | – | – | 2009-09-08 → 2010-11-15 |
| UI808AB | Influenza (trivalent) — Sanofi Pasteur | 66 | 7 | – | – | – | 2017-08-09 → 2018-04-26 |
| 111776P1 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 64 | 26 | – | – | – | 2010-08-10 → 2012-02-19 |
| UI993AB | Influenza (trivalent) — Sanofi Pasteur | 64 | – | – | – | – | 2018-08-09 → 2019-05-20 |
| U4715AA | Influenza (trivalent) — Sanofi Pasteur | 63 | 24 | – | – | – | 2013-09-02 → 2015-01-23 |
| U5017AA | Influenza (trivalent) — Sanofi Pasteur | 63 | 19 | – | – | – | 2014-01-31 → 2016-01-30 |
| 111770P1 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 62 | 22 | – | – | – | 2010-08-25 → 2013-09-09 |
| U3602AA | Influenza (trivalent) — Sanofi Pasteur | 62 | 25 | 1 | – | – | 2010-09-10 → 2011-02-01 |
| U4764AA | Influenza (trivalent) — Sanofi Pasteur | 61 | 17 | – | – | – | 2013-09-30 → 2017-01-11 |
| 5RS72 | Influenza (quadrivalent) — Glaxosmithkline Biologicals | 60 | – | – | – | – | 2019-10-25 → 2020-02-19 |
| UI158AA | Influenza (quadrivalent) — Sanofi Pasteur | 60 | 15 | – | – | – | 2014-09-10 → 2015-11-23 |
| U4489AA | Influenza (trivalent) — Sanofi Pasteur | 59 | 21 | 1 | – | – | 2012-08-15 → 2015-08-07 |
| BK2022 | Influenza nasal (quadrivalent) — Medimmune Vaccines, Inc. | 58 | 4 | – | – | – | 2013-10-30 → 2015-02-26 |
| U5016AA | Influenza (trivalent) — Sanofi Pasteur | 58 | 22 | – | – | – | 2014-08-23 → 2018-05-04 |
| 97841P1 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 57 | 17 | – | – | – | 2009-09-04 → 2010-11-23 |
| UT4163AA | Influenza (trivalent) — Sanofi Pasteur | 57 | 15 | – | – | – | 2011-10-03 → 2012-11-09 |
| 111785P1 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 56 | 16 | – | – | – | 2010-08-29 → 2011-10-19 |
| 97840P1 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 56 | 21 | – | – | – | 2009-09-02 → 2013-10-22 |
| U4717AA | Influenza (trivalent) — Sanofi Pasteur | 56 | 20 | 1 | – | – | 2013-08-19 → 2016-10-05 |
| UI669AA | Influenza (quadrivalent) — Sanofi Pasteur | 56 | 44 | 1 | – | – | 2016-09-22 → 2017-07-17 |
| 388477 | Influenza (trivalent) — Seqirus, Inc. | 55 | – | – | – | – | 2024-09-22 → 2024-12-19 |
| PN75E | Influenza (quadrivalent) — Glaxosmithkline Biologicals | 55 | 3 | – | – | – | 2017-09-26 → 2018-01-02 |
| U4490AA | Influenza (trivalent) — Sanofi Pasteur | 55 | 20 | – | – | – | 2012-08-19 → 2015-08-07 |
| UI664AA | Influenza (trivalent) — Sanofi Pasteur | 55 | 14 | – | – | – | 2016-09-08 → 2017-01-30 |
| UJ875AE | Influenza (quadrivalent) — Sanofi Pasteur | 55 | – | – | – | – | 2022-08-07 → 2022-10-17 |
| 1100401 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 54 | 24 | – | – | – | 2011-08-23 → 2012-10-26 |
| U4762BA | Influenza (trivalent) — Sanofi Pasteur | 54 | 8 | – | – | – | 2013-10-02 → 2015-01-23 |
| U4781AA | Influenza (trivalent) — Sanofi Pasteur | 54 | 10 | – | – | – | 2013-09-25 → 2015-01-23 |
| BH2091 | Influenza nasal (quadrivalent) — Medimmune Vaccines, Inc. | 53 | 3 | – | – | – | 2013-09-10 → 2014-08-25 |
| 1307601 | Influenza (trivalent) — Novartis Vaccines And Diagnostics | 52 | 19 | – | – | – | 2013-08-22 → 2015-01-19 |
| U4498BA | Influenza (trivalent) — Sanofi Pasteur | 52 | 17 | – | – | – | 2012-09-18 → 2015-08-07 |
| U4784AA | Influenza (trivalent) — Sanofi Pasteur | 52 | 16 | – | – | – | 2013-10-10 → 2015-01-23 |
| U5015AA | Influenza (trivalent) — Sanofi Pasteur | 52 | 12 | – | – | – | 2014-08-26 → 2017-01-31 |
| U5019AA | Influenza (trivalent) — Sanofi Pasteur | 52 | 12 | – | – | – | 2014-09-06 → 2015-11-23 |
| 388459 | Influenza (trivalent) — Seqirus, Inc. | 51 | 1 | – | – | – | 2024-09-05 → 2024-12-13 |
| U4525AA | Influenza (trivalent) — Sanofi Pasteur | 51 | 21 | 1 | – | – | 2012-10-07 → 2013-03-14 |
Common questions
How do I find my flu vaccine lot number?
The lot (batch) number is printed on your vaccination record card, on the vial or prefilled syringe label, and in your clinic's immunization record or state registry printout. It is usually 5–8 characters, letters and numbers.
What does a high report count for a flu vaccine lot mean?
Mostly that the lot was large or widely distributed, or shipped during a period of intense reporting. VAERS counts have no denominator unless shipment data is known, so a lot with more reports is not shown to be more harmful; compare the per-million-doses column where available and read the lot explorer's caveats.
Does a VAERS report mean the vaccine caused the event?
No. VAERS accepts any report from anyone; it is a signal-detection system, not a causal record. Reports are unverified and incomplete, and the same event can be reported more than once.
Related
Source: VAERS public data via the site's lot index (tools/apply_product_shell.py); shipment denominators where published. Generated 2026-10-08. Not medical advice.