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== Twinrix ==
'''Twinrix''' (/ˈtwɪnriks/) is a vaccine used to provide immunity against both [[hepatitis A]] and [[hepatitis B]] viruses. The name "Twinrix" is derived from the combination of two words: "twin", referring to the dual protection it offers, and "rix", a common suffix in the names of vaccines.

=== Usage ===
Twinrix is administered through injection, usually in the upper arm. It is typically given in three doses over a six-month period. The vaccine is recommended for adults and children over one year of age who are at risk of exposure to hepatitis A and B viruses.

=== Composition ===
Twinrix is composed of inactivated [[Hepatitis A virus]] and recombinant [[Hepatitis B virus]] surface antigen (HBsAg). The Hepatitis A component is produced by growing the virus in human [[MRC-5]] cells, while the Hepatitis B component is produced by recombinant DNA technology in yeast cells.

=== Side Effects ===
Common side effects of Twinrix include soreness at the injection site, headache, and fatigue. Severe allergic reactions are rare but can occur.

=== Precautions ===
People who have had a severe allergic reaction to a previous dose of Twinrix, or any component of the vaccine, should not receive Twinrix. Additionally, people who are severely ill should usually wait until they recover before getting the vaccine.

=== Interactions ===
Twinrix can be given at the same time as other vaccines. However, the injections should be given at different injection sites.

=== See Also ===
* [[Hepatitis A]]
* [[Hepatitis B]]
* [[Vaccine]]
* [[MRC-5]]

[[Category:Vaccines]]
[[Category:Hepatitis A]]
[[Category:Hepatitis B]]

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