Hepatitis A Vaccine
This is an inactivated vaccine that provides active immunization against Hepatitis A virus infection. The vaccine contains purified, killed hepatitis A virus particles (strain CR 326f) that stimulate the immune system to develop protection without causing disease. It is administered by injection and is used for both pre-exposure prophylaxis and post-exposure prevention in certain circumstances.
An inactivated vaccine that protects against Hepatitis A infection by stimulating the immune system to produce antibodies against the virus.
Key facts at a glance
- RxNorm
- 2274413
- Generic
- Hepatitis A Virus Strain Cr 326f Antigen, Inactivated
- Class
- unclassified
- Brands
- Vaqta
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- prefilled syringe, injection
- 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.
Prevention of hepatitis A virus infection in individuals at risk, including travelers to endemic regions, people with chronic liver disease, men who have sex with men, and those with occupational exposure risk. May also be used for post-exposure prophylaxis in close contacts of confirmed cases.
The vaccine contains inactivated (killed) hepatitis A virus antigen derived from the CR 326f strain. After administration, the immune system recognizes the antigen as foreign and produces protective antibodies, providing immunity against future hepatitis A virus exposure.
Standard vaccination series typically involves two doses given 6-12 months apart for long-term protection. Common side effects may include soreness at the injection site, headache, and fatigue. The vaccine is contraindicated in individuals with known hypersensitivity to any vaccine component. Adequate immunity develops approximately 2-4 weeks after the initial dose.
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