<unk>  is a<unk>  that prevents hepatitis A. It is effective in around 95% of cases and lasts for at least twenty years and possibly a person's entire life. If given, two doses are recommended beginning after the age of one. It is given by injection into a muscle. The first<unk>  was approved in Europe in 1991, and the United States in 1995. It is on the World Health Organization's List of Essential Medicines. The World Health Organization (WHO) recommends universal<unk> tion in areas where the disease is moderately common. Where the disease is very common, widespread<unk> tion is not recommended as all people typically develop immunity through infection during childhood. The Centers for Disease Control and Prevention (CDC) recommends<unk> ting: * 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 In addition, a person who has not previously received<unk>  and who has direct contact with someone with hepatitis A should get<unk>  within 2 weeks after exposure. Severe side effects are very rare. Pain at the site of injection occurs in about 15% of children and half of adults. Most<unk> s contain inactivated virus while a few contain weakened virus. The ones with weakened virus are not recommended during pregnancy or in those with poor immune function. A few formulations combine hepatitis A with either hepatitis B or typhoid<unk> . Soreness or redness where the shot is given, fever, headache, tiredness, or loss of appetite can happen after<unk> . As with any medicine, there is a very remote chance of a<unk>  causing a severe allergic reaction, other serious injury, or death.
Hepatitis A vaccine
Hepatitis B vaccine
Hepatitis C vaccine
Hepatitis A and B vaccine
Polio vaccine
Dengue vaccine
Typhus vaccine
Malaria vaccine