Logan Reed
Hepatitis A is a serious liver disease that can be fatal. It is usually spread by infected food or water, or through close contact with an infected person. The hepatitis A vaccine is a safe and effective way to prevent infection. It is recommended for all children between 12 months and 18 years of age in the United States, especially if they are travelling to regions where hepatitis A is common. The vaccine is administered in two doses, with the second dose given at least six months after the first.
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What You'll Learn
Hepatitis A vaccine recommendations for children
Hepatitis A is a liver disease caused by the hepatitis A virus (HAV). It is highly contagious and spreads mostly through contaminated food or drinks, as well as through close contact with infected individuals. The hepatitis A vaccine is a safe and highly effective way to prevent hepatitis A infections. Vaccination helps protect both the individual and others by preventing the spread of infection.
The Advisory Committee on Immunization Practices (ACIP) recommends routine vaccination for children aged 12-23 months, with a second dose administered at least six months later. Babies as young as six months can receive the vaccine if they will be travelling to regions where hepatitis A infections are common. However, they will still need the routine vaccination after their first birthday.
For children and adolescents aged 12 months to 18 years, two doses of the hepatitis A vaccine are recommended. The vaccine series is typically administered over the course of six months. The United States Food and Drug Administration (FDA) has licensed two single-antigen hepatitis A vaccines (Havrix and Vaqta) and one combination vaccine for protection against both hepatitis A and hepatitis B (Twinrix). All three vaccines are inactivated and safe for individuals with minor illnesses, such as a cold.
In addition to routine vaccination for children, ACIP recommends catch-up vaccination for unvaccinated individuals aged 2-18 years. The hepatitis A vaccine is also recommended for unvaccinated adults who are at increased risk of infection or severe disease. This includes international travellers, men who have sex with men, individuals who use or inject drugs, those with chronic liver disease, and people experiencing homelessness, among others.
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Hepatitis A vaccine side effects
Hepatitis A vaccines are generally safe and highly effective in preventing HAV infection. They are the best way to protect yourself against hepatitis A. The vaccine works by causing your body to produce its own antibodies to protect against the disease. Vaccines, like any medicine, can have side effects. However, these side effects are usually mild and last 1-2 days.
The most common side effects include soreness, redness, or irritation at or around the injection site. Other potential side effects include mild headache, loss of appetite (especially among children), low fever, tiredness, drowsiness, and irritability.
In rare cases, more serious problems may occur, such as an allergic reaction, which may appear within a few minutes or hours after receiving the vaccine. Anyone who experiences symptoms of an allergic reaction, such as swelling or redness of the face, hives, or other concerning symptoms, should seek medical attention immediately.
It is important to note that the potential risks associated with hepatitis A are much higher than any risks linked to the vaccine. Since the vaccine was licensed in 1995, approximately 50 million doses have been distributed in the United States, with only 6,136 reports of adverse events. This data demonstrates the vaccine's overall safety and effectiveness.
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Hepatitis A vaccine for international travellers
Hepatitis A is a liver infection preventable by safe and effective vaccines. Vaccination is the best way to protect yourself against hepatitis A. The Advisory Committee on Immunization Practices (ACIP) recommends routine hepatitis A vaccination for all children aged 12-23 months and catch-up vaccination for children aged 2-18 years who have not previously received the vaccine. Babies as young as 6 months can get the vaccine if they will be travelling to a place where hepatitis A infections are common.
Hepatitis A is among the most common vaccine-preventable infections acquired during travel. Cases of travel-related hepatitis A have been reported in both developed and developing countries, even in those who regularly wash their hands. The risk is greatest for those who live in or visit rural areas, trek in backcountry areas, or frequently eat or drink in settings with poor sanitation. Sporadic outbreaks have been reported in Australia, Europe, North America, and other regions with low levels of endemic transmission. Multinational hepatitis A outbreaks have also been described among men who have sex with men (MSM). Considering the complexity of interpreting hepatitis A risk maps, some experts advise people travelling outside the United States to consider hepatitis A vaccination regardless of their destination.
Vaccination against hepatitis A is recommended if you are travelling to countries where there are poor levels of sanitation and hygiene, and hepatitis A is common. Vaccination is also recommended for unvaccinated household members and other people who anticipate close personal contact with an international adoptee from a high- or intermediate-endemicity country within 60 days of the child's arrival.
The hepatitis A vaccine series are typically administered over the course of 6 months. There are two types of hepatitis A vaccines: single-antigen and combination. The single-antigen vaccine protects against hepatitis A, while the combination vaccine protects against both hepatitis A and hepatitis B. The United States Food and Drug Administration (FDA) has licensed two single-antigen hepatitis A vaccines (Havrix and Vaqta) and one combination vaccine for protection against both hepatitis A and hepatitis B (Twinrix) for use in the US. Twinrix involves three doses administered over a 6-month schedule, but it can be accelerated to a 30-day schedule before travel, followed by a booster dose at 12 months for long-term protection.
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Hepatitis A vaccine for adults
Hepatitis A is a serious liver disease caused by the hepatitis A virus (HAV). The hepatitis A vaccine is highly effective in preventing HAV infection and has been shown to confer long-term immunity for at least 20 years. Vaccination is the best way to protect yourself against hepatitis A.
The United States Food and Drug Administration (FDA) has licensed two single-antigen hepatitis A vaccines (Havrix and Vaqta) and one combination hepatitis A and hepatitis B vaccine (Twinrix) for use in the US. All three are inactivated vaccines and contain an aluminum adjuvant. Havrix and Vaqta are licensed for people 12 months and older, with individuals 19 and older requiring two doses. Twinrix is licensed for adults 18 and older and contains HAV antigen and recombinant hepatitis B virus (HBV) surface antigen protein.
The Advisory Committee on Immunization Practices (ACIP) recommends routine vaccination for children ages 12-23 months and catch-up vaccination for children ages 2-18 years who have not previously received the hepatitis A vaccine. ACIP also recommends hepatitis A vaccination for unvaccinated adults who are at increased risk of infection or severe disease from infection. This includes international travelers, men who have sex with men, people who use or inject drugs, people experiencing homelessness, and those with chronic liver disease or HIV.
The hepatitis A vaccine is generally safe and effective, even for people with compromised immune systems. However, as with any medicine, there is a small risk of serious adverse reactions. Individuals with severe allergies or a history of allergic reactions to the hepatitis A vaccine or its ingredients should not receive the vaccine. People who are moderately or severely ill should wait until they recover before getting vaccinated, although those with minor illnesses such as a cold can still receive the vaccine.
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Hepatitis A vaccine safety
Hepatitis A vaccines are safe and highly effective at preventing hepatitis A infections. Vaccines, like any medicine, can have side effects, but the common side effects are usually mild and last 1-2 days. The most frequently reported adverse events associated with the hepatitis A vaccination are fever, injection site reactions, rash, and headache.
The Vaccine Adverse Event Reporting System (VAERS) is an early warning system co-managed by the CDC and FDA that monitors for potential vaccine safety problems. Healthcare providers and vaccine manufacturers are required by law to report certain adverse events following vaccination to VAERS; patients and caregivers can also submit reports. A 2-year review of Hepatitis A vaccine safety using VAERS data found no safety problems when the vaccine was used as part of the routine immunization schedule in the United States.
The hepatitis A vaccine is recommended for children 12-23 months old, who will get a second dose at least 6 months later. Babies as young as 6 months old can also get it if they will travel to a place where hepatitis A infections are common. They'll still need the routine vaccination after their first birthday. The hepatitis A vaccine is also recommended for all older kids and adults who haven't already gotten vaccinated, especially if they have a higher risk of infection.
Hepatitis A vaccines are given as injections or shots that contain a small piece of the hepatitis A virus that's killed or inactivated. The vaccine can't cause hepatitis A infections. After someone is given the vaccine, the body's immune system makes proteins called antibodies, which can spot the virus.
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Frequently asked questions
The Hepatitis A vaccine is a safe and effective way to prevent infection caused by the Hepatitis A virus (HAV). The vaccine is typically administered as a series of two shots, with the second shot being given at least six months after the first.
The Advisory Committee on Immunization Practices (ACIP) recommends routine vaccination for children between the ages of 12 and 23 months. The vaccine is also recommended for older children and adults who haven't previously received it, especially those with a higher risk of infection, such as international travelers or those with chronic liver disease.
The Hepatitis A vaccine is considered safe, with mild and temporary side effects such as low fever, headache, tiredness, and soreness at the injection site. However, those with severe allergies or a history of severe allergic reactions should consult a doctor before receiving the vaccine.
