Hepatitis A vaccine
Vaccine description | |
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Target | Hepatitis A virus |
Vaccine type | Inactivated or attenuated |
Clinical data | |
Trade names | Biovac A, Havrix, Vaqta, others |
AHFS/Drugs.com | Monograph |
MedlinePlus | a695003 |
Pregnancy category |
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Intramuscular | |
ATC code | |
Legal status | |
Legal status | |
Identifiers | |
DrugBank | |
ChemSpider |
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UNII | |
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Hepatitis A vaccine is a
The World Health Organization (WHO) recommends universal vaccination in areas where the disease is moderately common.[1] Where the disease is very common, widespread vaccination is not recommended as all people typically develop immunity through infection during childhood.[1] The US Centers for Disease Control and Prevention (CDC) recommends vaccinating:[7]
- All children aged 12–23 months
- Unvaccinated children and adolescents aged 2–18 years
- International travelers
- Men who have sex with men
- People who use injection or non-injection drugs
- People who have occupational risk for infection
- People who anticipate close contact with an international adoptee
- People experiencing homelessness
- People with HIV
- People with chronic liver disease
- Any person wishing to obtain immunity[8]
In addition, a person who has not previously received hepatitis A vaccine and who has direct contact with someone with hepatitis A should get hepatitis A vaccine within two weeks after exposure.[8]
Severe side effects are very rare.
Soreness or redness where the shot is given, fever, headache, tiredness, or loss of appetite can happen after hepatitis A vaccine. As with any medicine, there is a very remote chance of a vaccine causing a severe allergic reaction, other serious injury, or death.[8]
Medical uses
Within the US, the vaccine "Vaqta" developed by
The US Centers for Disease Control and Prevention (CDC), recommends vaccination of all children over one year of age, people whose sexual activity puts them at risk, people with chronic liver disease, people who are being treated with clotting factor concentrates, people working in close proximity to the virus, and people who are living in communities where an outbreak is present.[14] Hepatitis A is the most common vaccine-preventable virus acquired during travel,[15] so people traveling to places where the virus is common like the Indian subcontinent, Africa, Central America, South America, Asia, and Eastern Europe should be vaccinated.[14][16]
The vaccine is given in the muscle of the upper arm, in two doses for the best protection. The initial dose of the vaccine should be followed up by a booster six to twelve months later.[14] Protection against hepatitis A begins approximately two to four weeks after the initial vaccination.[14][16] Protection lasts at least 15 years and is estimated to last at least 25 years if the booster is administered.[17]
A
Commercial vaccines
Several commercial hepatitis A vaccines are available. The definition of (U)nits varies among manufacturers depending on how hepatitis A antigen is measured in their products.
- Avaxim: made by Sanofi Pasteur. Inactivated hepatitis A virus produced in MRC-5 cells. Each dose contains 160 U of antigen adsorbed on aluminium hydroxide (0.3 mg Al).[19]
- Epaxal: made by
- Havrix: made by
- Healive: made by diploid cell, followed by harvest, purification, inactivation, and aluminium adsorption. Each adult dose contains 500 U of viral antigen. The pediatric dose contains 250 U of viral antigen.[citation needed]
- Vaqta: made by Merck. Inactivated hepatitis A virus produced in MRC-5 cells. An adult dose contains 50 U of antigen adsorbed onto 0.45 mg of aluminium (as aluminium hydroxyphosphate sulfate); a child dose contains half the amounts of antigen and aluminium.[22]
- Biovac-A: made by sero-conversion remained and antibody titre was not less than 128 IU/ml, 15 years after vaccination.[citation needed]
Combination vaccines
- Hepatitis A and B vaccine is a vaccine against hepatitis A and hepatitis B.[23]
References
- ^ PMID 22905367.
- hdl:10665/363397.
- ^ "Hepatitis a Q&As for Health Professionals | CDC". 19 January 2022.
- ^ ISBN 9781908818195.
- hdl:10665/325771. WHO/MVP/EMP/IAU/2019.06. License: CC BY-NC-SA 3.0 IGO.
- hdl:10665/345533. WHO/MHP/HPS/EML/2021.02.
- PMID 32614811.
- ^ a b c "Hepatitis A Vaccine Information Statement". Centers for Disease Control and Prevention (CDC). October 2021. Retrieved 13 July 2022. This article incorporates text from this source, which is in the public domain.
- ^ "Hepatitis A: Vaccine Licensed | History of Vaccines". historyofvaccines.org. Retrieved 6 February 2021.[permanent dead link]
- PMC 7150172.
- ^ "Materials Documenting the Contribution of Dr. Maurice Hilleman to the Millennium Time Capsule Ceremony". National Museum of American History. Retrieved 14 February 2021.
- ^ "Hepatitis A Vaccine Information". Vaccine Information. ImmunizationInfo. Archived from the original on 30 June 2007. Retrieved 19 June 2008.
- ^ "Hepatitis A Vaccine - an overview | ScienceDirect Topics". sciencedirect.com. Retrieved 14 February 2021.
- ^ a b c d "Hepatitis A Vaccine: What you need to know" (PDF). Vaccine Information Statement. Centers for Disease Control and Prevention (CDC). 21 March 2006. Archived (PDF) from the original on 20 November 2007. Retrieved 12 March 2007.
- ^ "Hepatitis, Viral, Type A". Travelers' Health: Yellow Book (CDC). Archived from the original on 28 March 2007. Retrieved 12 March 2007.
- ^ a b "Hepatitis A: Introduction". NHS Direct. 10 October 2006. Archived from the original on 10 March 2007. Retrieved 12 March 2007.
- PMID 22609026.
- PMID 22786522.
- ^ Patient Information Leaflet Archived 20 July 2011 at the Wayback Machine, sanofi pasteur, July 2010. Archived on the electronic Medicines Compendium of the UK. Accessed 30 November 2010.
- ^ Epaxal Archived 19 January 2011 at the Wayback Machine, Crucell website. Accessed 30 November 2010.
- ^ Full Prescribing Information Archived 18 August 2011 at the Wayback Machine, GlaxoSmithKline, July 2010. Archived on FDA website. Accessed 30 November 2010.
- ^ "VAQTA (Hepatitis A Vaccine, Inactivated)" (PDF). U.S. Food and Drug Administration (FDA). p. 11. Archived (PDF) from the original on 21 February 2015. Retrieved 7 February 2014.
- ^ "Twinrix". U.S. Food and Drug Administration (FDA). 3 October 2019. Retrieved 18 October 2020.
- ^ "Australian Product Information – Vivaxim (Salmonella typhi Vi polysaccharide and hepatitis A virus antigen) Vaccine". Retrieved 18 October 2020.
- ^ "Vivaxim Salmonella typhi vaccine; Hepatitis A vaccine". 6 March 2020. Retrieved 18 October 2020.
- ^ "Vivaxim 1mL injection syringe composite pack". Therapeutic Goods Administration (TGA). Archived from the original on 19 October 2020. Retrieved 18 October 2020.
- ^ "Summary for ARTG Entry: 82745 Vivaxim 1mL injection syringe composite pack". Therapeutic Goods Administration (TGA). Retrieved 18 October 2020.[permanent dead link]
Further reading
- Ramsay M, ed. (2013). "Chapter 17: Hepatitis A". Immunisation against infectious disease. Public Health England.
- Hall E, Wodi AP, Hamborsky J, Morelli V, Schillie S, eds. (2021). "Chapter 9: Hepatitis A". Epidemiology and Prevention of Vaccine-Preventable Diseases (14th ed.). Washington D.C.: U.S. Centers for Disease Control and Prevention (CDC).
External links
- Hepatitis A Vaccines at the U.S. National Library of Medicine Medical Subject Headings (MeSH)