Influenza A Virus (H1n1) Vaccine
Influenza A Virus (H1N1) Antigen is a preparation containing specific viral antigens derived from the H1N1 strain of influenza A virus. This type of antigen is typically used for diagnostic testing purposes to detect antibodies against H1N1 in a patient's blood, helping determine immunity or recent infection status. Healthcare providers may use it in clinical or laboratory settings to assess a patient's exposure or immune response to this particular influenza subtype.
A diagnostic antigen used to detect antibodies or immunity against H1N1 influenza A virus.
Key facts at a glance
- RxNorm
- 1657128
- Generic
- Influenza A Virus (H1n1) Antigen
- Class
- unclassified
- Brands
- Flulaval Quadrivalent 2022-2023, Fluarix Quadrivalent 2022-2023, Fluzone Quadrivalent 2022-2023, Fluad Quadrivalent 2022-2023, Afluria Quadrivalent 2022-2023, Flublok Quadrivalent 2022-2023, Flucelvax Quadrivalent 2022-2023, FluMist Quadrivalent 2022-2023, FluMist Quadrivalent 2023-2024, Fluad Quadrivalent 2023-2024, Flulaval Quadrivalent 2023-2024, Afluria Quadrivalent 2023-2024, Flucelvax Quadrivalent 2023-2024, Fluzone Quadrivalent 2023-2024, Fluarix Quadrivalent 2023-2024
- Availability
- rx
- Lactation
- unknown
- Routes
- nasal
- Forms
- prefilled syringe, injection, spray, suspension
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Primarily used for diagnostic purposes, including screening for H1N1 antibodies to determine prior exposure, immunity status, or to support diagnosis of influenza infection. May be used in clinical laboratory settings or by healthcare professionals.
Contains inactivated or processed H1N1 viral antigens that can react with specific antibodies in a patient's blood sample during diagnostic testing, such as hemagglutination inhibition assays, complement fixation tests, or other immunoassay methods.
This is a diagnostic antigen, not a vaccine or treatment. Should only be used by qualified laboratory personnel or healthcare professionals. Storage and handling requirements must be followed per manufacturer specifications. Not for self-administration. Use during pregnancy and lactation should be determined by a healthcare provider.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 29, 2026. · Read our editorial policy