Hepatitis A Vaccine And Travel
If youâre going to a country where hepatitis A is common and youâve never had the virus or the vaccine, start the vaccination process as soon as you can. It takes 2 to 4 weeks after the first dose for the vaccine to work, but even one shot a few days before you leave will give you some protection.
People who are allergic to something in the vaccine and children younger than 6 months might instead get a shot of immune globulin , which will protect against hepatitis A for up to 2 months.
Hepatitis A And International Travel
Who should receive protection against hepatitis A virus before travel?
All susceptible people traveling to or working in countries that have high or intermediate HAV endemicity are at increased risk for HAV infection. These travelers should be vaccinated or receive immune globulin before departure . For more information on international travel and hepatitis A, see CDCs travel page or ACIP updated recommendations on Prevention of Hepatitis A after Exposure to Hepatitis A Virus and in International Travelers.
How soon before international travel should the first dose of hepatitis A vaccine be given?
All unvaccinated people 12 months of age planning travel to an area with high or intermediate HAV endemicity should receive a single dose of vaccine as soon as travel is considered they should then complete the vaccine series with the appropriate dose and schedule. People traveling within 2 weeks should receive the initial dose of hepatitis A vaccine before departure and also simultaneously may be administered IG at a separate anatomic injection site for additional short-term protection . The hepatitis A vaccine series should be completed according to the routine schedule. Information on immune globulin dosing and additional information on hepatitis A vaccine and travel is available.
What should be done to protect international travelers < 6 months of age and other travelers unable to receive hepatitis A vaccine?
Can Bleach Or Cleaner Kill Hepatitis A
Disinfectant that contains bleach can kill the hepatitis A virus on hard non-porous surfaces like toilet seats. However, freezing does not kill HAV.
If you cook food that is contaminated for one minute at cooking temperatures higher than 185ºF , it will kill HAV. However, food can be contaminated after cooking, so it is very important to wash your hands well with soap and water.
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Hepatitis A: Who Is At Risk
A prime risk factor for hepatitis A is traveling to or living in a country with high infection rates. You can check the CDC’s travel advisories to learn about recent outbreaks. Eating raw foods or drinking tap water can raise your risk while traveling. Children who attend daycare centers also have a higher risk of getting hepatitis A.
What Are The Symptoms Of Hepatitis
Some people with hepatitis do not have symptoms and do not know they are infected. If you do have symptoms, they may include:
- Joint pain
- Jaundice, yellowing of your skin and eyes
If you have an acute infection, your symptoms can start anywhere between 2 weeks to 6 months after you got infected. If you have a chronic infection, you may not have symptoms until many years later.
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How Long Does The Hepatitis A Vaccine Last
We dont know exactly how long the protection of the vaccine lasts, but studies have indicated that it lasts at least 20 years in some people and it could last as long as 40 years or more. Having only one dose of the recommended two-dose vaccine has shown to provide protection for at least 10 years.
Prognosis For Hepatitis A
The CDC in the United States had reported in the 1990s of about 4 deaths per 1000 people who are infected in the normal population, the risk of which increases in people who are above the age of 50. There is increased risk of liver failure from this infection with increase in age and in people who already have an underlying liver disease. Children who are infected with this disease recover within a month of the onset of symptoms.
|Written, Edited or Reviewed By:Pramod Kerkar, M.D., FFARCSI, DA Pain Assist Inc.This article does not provide medical advice. See disclaimerLast Modified On: August 7, 2018|
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What Are The Signs And Symptoms Of Hepatitis A Virus Infection
The incubation period of hepatitis A virus is 2-7 weeks . Clinical symptoms then develop, often with a presentation similar to that of gastroenteritis or a viral respiratory infection. The most common signs and symptoms include fatigue, nausea, vomiting, fever, hepatomegaly, jaundice, dark urine, anorexia, and rash.
HAV infection usually occurs as a mild self-limited disease and confers lifelong immunity to the virus. Chronic HAV infection does not occur.
What Is The Medical Treatment For Hepatitis A
- If a patient becomes dehydrated, the doctor may prescribe IV fluids.
- If a patient is experiencing significant nausea and vomiting, he or she will receive medicines to control these symptoms.
- People whose symptoms are well controlled can be cared for at home.
- If dehydration or other symptoms are severe, or if the patient is extremely confused or difficult to arouse, he or she will most likely be hospitalized.
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Immunisation Against Hepatitis A
Immunisation is the best protection against hepatitis A infection and is recommended for people in high-risk groups, and for unvaccinated people who have been in close contact with someone who has hepatitis A.
Immunisation against hepatitis A includes a course of injections over a 6 to 12-month period. Healthy people 12 months of age and over receive 2 doses of hepatitis A vaccine, or 3 doses if the hepatitis A and hepatitis B vaccines are given as a combination.
You can complete any missed vaccine doses, even if the recommended time frame has passed. You do not need to start the vaccine course again.
If you are in close contact with someone who has hepatitis A be sure to have the hepatitis A vaccine if you have not already completed a vaccine course.
Babies under 12 months of age and people who have a weakened immune system who are also in close contact with a person with hepatitis A can have an injection of normal human immunoglobulin instead of the hepatitis A vaccine.
Protection against hepatitis A is available free of charge under the National Immunisation Program Schedule for Aboriginal and Torres Strait Islander children who live in high-risk areas .
Pregnancy And Hepatitis A Immunisation
Hepatitis A immunisation is not usually recommended for women who are pregnant although vaccination might be recommended in some situations.
Speak with your doctor if you are not immune to hepatitis A and you are at increased risk of infection or if you have a pre-existing medical condition such as liver disease.
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Who Is At Risk Of Getting Hepatitis A
Hepatitis A is usually spread from person to person, making it highly contagious. However, certain factors can increase your risk of contracting it, including:
- living in an area where hepatitis A is common, including most countries with low sanitation standards or a lack of safe water
- injecting or using illegal drugs
- living in the same household as someone who is hepatitis A-positive
- having sexual activity with someone who is hepatitis A-positive
- being HIV-positive
Managing Fever After Immunisation
Common side effects following immunisation are usually mild and temporary . Specific treatment is not usually required.There are a number of treatment options that can reduce the side effects of the vaccine including:
- Drinking extra fluids to drink and not overdressing if there is a fever.
- Although routine use of paracetamol after vaccination is not recommended, if fever is present, paracetamol can be taken check the label for the correct dose or speak with your pharmacist .
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Managing Injection Site Discomfort
Many vaccine injections may result in soreness, redness, itching, swelling or burning at the injection site for one to 2 days. Paracetamol might be required to ease the discomfort. Sometimes a small, hard lump at the injection site may persist for some weeks or months. This should not be of concern and requires no treatment.
How Is The Virus Spread
Hepatitis A virus is usually spread from person to person by putting something in the mouth that has been contaminated with the stool of a person with hepatitis A. This type of transmission is called the “fecal-oral” route. For this reason, the virus is more easily spread in areas where there are poor sanitary conditions or where good personal hygiene is not observed.
Most infections in the United States result from contact with a household member or sex partner who has hepatitis A.Hepatitis A virus may also be spread by consuming food or drink that has been handled by an infected person. Waterborne outbreaks are infrequent and are usually associated with sewage-contaminated or inadequately treated water. Casual contact, as in the office, factory or school setting, does not spread the virus.
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What Are The Common Types Of Viral Hepatitis
Although the most common types of viral hepatitis are HAV, HBV, and HCV, some clinicians had previously considered the acute and chronic phases of hepatic infections as “types” of viral hepatitis. HAV was considered to be acute viral hepatitis because the HAV infections seldom caused permanent liver damage that led to hepatic failure. HBV and HCV produced chronic viral hepatitis. However, these terms are outdated and not currently used as frequently because all of the viruses that cause hepatitis may have acute phase symptoms . Prevention techniques and vaccinations have markedly reduced the current incidence of common viral hepatitis infections however, there remains a population of about 1 to 2 million people in the U.S. with chronic HBV, and about 3.5 million with chronic HCV according to the CDC. Statistics are incomplete for determining how many new infections occur each year the CDC documented infections but then goes on to estimate the actual numbers by further estimating the number of unreported infections .
Types D, E, and G Hepatitis
Individuals who already have chronic HBV infection can acquire HDV infection at the same time as they acquire the HBV infection, or at a later time. Those with chronic hepatitis due to HBV and HDV develop cirrhosis rapidly. Moreover, the combination of HDV and HBV virus infection is very difficult to treat.
What Causes Hepatitis
There are different types of hepatitis, with different causes:
- Viral hepatitis is the most common type. It is caused by one of several viruses — hepatitis viruses A, B, C, D, and E. In the United States, A, B, and C are the most common.
- Alcoholic hepatitis is caused by heavy alcohol use
- Toxic hepatitis can be caused by certain poisons, chemicals, medicines, or supplements
- Autoimmune hepatitis is a chronic type in which your body’s immune system attacks your liver. The cause is not known, but genetics and your environment may play a role.
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How Is It Spread
Hepatitis A is spread when a person ingests fecal mattereven in microscopic amountsfrom contact with objects, food, or drinks contaminated by feces or stool from an infected person.
Hepatitis B is primarily spread when blood, semen, or certain other body fluids- even in microscopic amounts from a person infected with the hepatitis B virus enters the body of someone who is not infected. The hepatitis B virus can also be transmitted from:
- Birth to an infected mother
- Sex with an infected person
- Sharing equipment that has been contaminated with blood from an infected person, such as needles, syringes, and even medical equipment, such as glucose monitors
- Sharing personal items such as toothbrushes or razors
- Poor infection control has resulted in outbreaks in health care facilities
Hepatitis C is spread when blood from a person infected with the Hepatitis C virus even in microscopic amounts enters the body of someone who is not infected. The hepatitis C virus can also be transmitted from:
- Sharing equipment that has been contaminated with blood from an infected person, such as needles and syringes
- Receiving a blood transfusion or organ transplant before 1992
- Poor infection control has resulted in outbreaks in health care facilities
- Birth to an infected mother
What Causes Hepatitis A And How Is It Contracted
People develop hepatitis A infection after contracting HAV. This virus is typically transmitted by ingesting food or liquid contaminated with fecal matter that contains the virus. Once transmitted, the virus spreads through the bloodstream to the liver, where it causes inflammation and swelling.
In addition to transmission from eating food or drinking water containing HAV, the virus can also be spread by close personal contact with an infected person. HAV is contagious, and a person who has hepatitis A can easily pass the disease to others living in the same household.
You can contract hepatitis A by:
- eating food prepared by someone with the hepatitis A virus
- eating food handled by preparers who dont follow strict hand-washing routines before touching food that you eat
- eating sewage-contaminated raw shellfish
- not using condoms when having sex with someone who has the hepatitis A virus
- drinking polluted water
- coming in contact with hepatitis A-infected fecal matter
If you contract the virus, you will be contagious two weeks before symptoms even appear. The contagious period will end about one week after symptoms appear.
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How Can You Prevent Hepatitis A
There is a vaccine, made from an inactivateddeadvirus to prevent hepatitis A. If you are not sure you have had the vaccine, you can ask your doctor to test you to see if you have been vaccinated.
You can also practice good hand washing hygiene. Make sure you use soap and warm water to wash your hands for at least 15 to 30 seconds after you use the toilet, change diapers, and before and after touching food.
If you are traveling in another country, especially a developing country, drink only bottled water and use only bottled water to brush your teeth, wash your produce, and freeze for ice cubes.
Can Hepatitis A Be Prevented Or Avoided
The best way to protect yourself against hepatitis A is to get the vaccine. The hepatitis A vaccination is recommended for all children older than age 1. It begins to protect you only 4 weeks after you are vaccinated. A 6- to 12-month booster is required for long-term protection. Ask your doctor if the vaccination is right for you.
You should also wash your hands with soap and warm water before and after cooking, after using the bathroom, and after changing diapers.
Wash fruits and vegetables thoroughly before eating and avoid raw or undercooked meat and fish.
You are at higher risk for hepatitis A if you:
- Live with or have sex with someone who has hepatitis A
- Travel to countries where hepatitis A is common
- Are a man who has sex with other men
- Use illegal drugs
- Have a clotting-factor disorder
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Causes Of Hepatitis A
Hepatitis A is caused by a virus. The virus can survive for several hours outside the body but persists on the hands and in food for even longer. It is resistant to heating and freezing.
The virus is spread when it enters the mouth, which can happen when hands, foods or other items are contaminated with the faeces of a person with hepatitis A. The disease can also be spread sexually by oral or anal contact.
A person with hepatitis A is infectious from 2 weeks before they show symptoms to one week after they become jaundiced .
If an infected person has no jaundice, they may pass on the virus until 2 weeks after they first have symptoms . Caution is advised beyond this period as the virus can be shed in stools for longer periods.
Diagnosis Of Hepatitis A
Although this virus is eliminated from the body via stool, a confirmatory diagnosis of hepatitis A is made when specific IgM antibodies are found in blood draws. This antibody can be detected after a couple of weeks of contracting the infection and be present in the blood for as long as four months. The presence of this antibody signifies that the acute phase of the disease is finished and the body becomes immune to any further infection. When this disease is at its acute stage, the levels of ALT in blood is significantly high than normal due to injury to the liver cells due to the virus.
What Is Chronic Viral Hepatitis
Patients infected with HBV and HCV can develop chronic hepatitis. Doctors define chronic hepatitis as hepatitis that lasts longer than 6 months. In chronic hepatitis, the viruses live and multiply in the liver for years or decades. For unknown reasons, these patients’ immune systems are unable to eradicate the viruses, and the viruses cause chronic inflammation of the liver. Chronic hepatitis can lead to the development over time of extensive liver scarring , liver failure, and liver cancer. Liver failure from chronic hepatitis C infection is the most common reason for liver transplantation in the U.S. Patients with chronic viral hepatitis can transmit the infection to others with blood or body fluids as well as infrequently by transmission from mother to newborn.