Tick-borne encephalitis vaccine is a

vaccine A vaccine is a biological Dosage form, preparation that provides active acquired immunity to a particular infectious disease, infectious or cancer, malignant disease. The safety and effectiveness of vaccines has been widely studied and verifie ...

used to prevent

tick-borne encephalitis Tick-borne encephalitis (TBE) is a viral infectious disease involving the central nervous system. The disease most often manifests as meningitis, encephalitis or meningoencephalitis. Myelitis and spinal paralysis also occurs. In about one third ...

(TBE). The disease is most common in

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and

Eastern Europe Eastern Europe is a subregion of the Europe, European continent. As a largely ambiguous term, it has a wide range of geopolitical, geographical, ethnic, cultural, and socio-economic connotations. The vast majority of the region is covered by Russ ...

, and Northern

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

. More than 87% of people who receive the vaccine develop immunity. It is not useful following the bite of an infected tick. It is given by

injection into a muscle Intramuscular injection, often abbreviated IM, is the injection of a substance into a muscle. In medicine, it is one of several methods for parenteral administration of medications. Intramuscular injection may be preferred because muscles ha ...

. The

World Health Organization The World Health Organization (WHO) is a specialized agency of the United Nations responsible for international public health. The WHO Constitution states its main objective as "the attainment by all peoples of the highest possible level of h ...

(WHO) recommends immunizing all people in areas where the disease is common. Otherwise the vaccine is just recommended for those who are at high risk. Three doses are recommended followed by additional doses every three to five years. The vaccines can be used in people more than one or three years of age depending on the formulation. The vaccine appears to be safe during

pregnancy Pregnancy is the time during which one or more offspring develops ( gestates) inside a woman's uterus (womb). A multiple pregnancy involves more than one offspring, such as with twins. Pregnancy usually occurs by sexual intercourse, but ca ...

. Serious side effects are very uncommon. Minor side effects may include

fever Fever, also referred to as pyrexia, is defined as having a body temperature, temperature above the human body temperature, normal range due to an increase in the body's temperature Human body temperature#Fever, set point. There is not a single ...

, and redness and pain at the site of injection. Older formulations were more commonly associated with side effects. The first vaccine against TBE was developed in 1937. It is on the

World Health Organization's List of Essential Medicines The WHO Model List of Essential Medicines (aka Essential Medicines List or EML), published by the World Health Organization (WHO), contains the medications considered to be most effective and safe to meet the most important needs in a health ...

. The vaccine was approved for medical use in the United States in August 2021.

Medical uses

In the United States, tick-borne encephalitis vaccine is indicated for active immunization to prevent tick-borne encephalitis (TBE) in individuals one year of age and older. The efficacy of these vaccines has been well documented. They have also been shown to protect mice from a lethal challenge with several TBE-virus isolates obtained over a period of more than 30 years from all over Europe and the Asian part of the former Soviet Union. In addition, it has been demonstrated that antibodies induced by vaccination of human volunteers neutralized all tested isolates.

Pregnancy and breastfeeding

The vaccine appears to be safe during

, but because of insufficient data the vaccine is only recommended during pregnancy and breastfeeding when it is considered urgent to achieve protection against TBE infection and after careful consideration of risks versus benefits.

Schedule

Two to three doses are recommended depending on the formulation. Typically one to three months should occur between the first doses followed by five to twelve months before the final dose. Additional doses are then recommended every three to five years. A study from 2006 suggests that the FSME-Immun/Ticovac and Encepur are interchangeable for booster vaccination, but cautions against change during the primary immunization course.

History

The first vaccine against TBE was prepared in 1937 in the brains of mice. Some 20 years later TBE vaccines derived from cell cultures (chicken embryo fibroblast cells) were developed and used for active immunization in humans in the former Soviet Union. Later, a purified, inactivated virus vaccine was developed which proved to be more immunogenic than previous TBE vaccines.

Society and culture

Economics

Per dose it costs between and in the United Kingdom.

Brand names

Brand names of the vaccines include Encepur N, FSME-Immun CC and Ticovac, Encevir-Neo, Klesh-E-Vak.

References

External links

* {{DEFAULTSORT:Tick-borne Encephalitis Vaccine Inactivated vaccines Vaccines World Health Organization essential medicines (vaccines) Wikipedia medicine articles ready to translate