Hepatitis B Vaccine Side Effects
The hepatitis B vaccine is considered a very safe and effective vaccine. Its made with an inactivated virus, so most types of the vaccine are even safe for pregnant people.
The hepatitis B vaccine may cause some mild side effects. The most common symptom is redness, swelling, or soreness where the injection was given. Some people also experience headache or fever. These effects usually last a day or two .
Rarely, some people have a serious and potentially life threatening allergic reaction to the vaccine. Call 911 or get to a hospital immediately if you experience any of the following symptoms after vaccination:
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How Common Is Hepatitis B
One U.S. study following trends in hepatitis B infection over a three-year periodfound that 4.3% of the population had a past or present HBV infection.
Estimates suggest that about 240 million people around the world have chronic hepatitis B. Up to 1.89 million people in the United States have a chronic HBV infection.
For Children And Adolescents
The dosage for both MMR and MMRV is 0.5 mL. All three vaccines are administered by the subcutaneous route.
The minimum age for both MMR vaccines and MMRV is 12 months of age. The typical age for the second dose of either vaccine is at 4 to 6 years of age. The maximum age for administration of MMRV is 12 years. It should not be administered to anyone 13 years of age or older. Both MMR vaccines may be administered to anyone 12 months of age or older.
The minimum interval between MMR doses is 4 weeks . The minimum interval between MMRV doses is 3 months.
The preferred injection site in small children is the anterolateral aspect of the thigh. The posterior triceps aspect of the upper arm is the preferred site for older children and adolescents.
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Babies And Hepatitis B Vaccination
Pregnant women have a routine blood test for hepatitis B as part of their antenatal care.
Babies born to mothers infected with hepatitis B need to be given a dose of the hepatitis B vaccine within 24 hours of their birth, followed by further doses at 4, 8, 12 and 16 weeks of age, plus a final dose when they’re 1 year old.
Babies of mothers identified by the blood test as particularly infectious might also be given an injection of HBIG at birth on top of the hepatitis B vaccination to give them rapid protection against infection.
All babies born to mothers infected with hepatitis B should be tested at 1 year of age to check if they have become infected with the virus.
The Hepatitis B Vaccine And Immunosuppressants
If you are taking or about to start taking a medication that suppresses your immune response, let your healthcare provider know. Immunosuppressants may make certain vaccines less effective. Your healthcare provider may recommend that you get the hepatitis B vaccine at a particular time during your course of medication.
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Emergency Hepatitis B Vaccination
If you have been exposed to the hepatitis B virus and have not been vaccinated before, you should get immediate medical advice, as you may benefit from having the hepatitis B vaccine.
In some situations, you may also need to have an injection of antibodies, called specific hepatitis B immunoglobulin , along with the hepatitis B vaccine.
HBIG should ideally be given within 48 hours, but you can still have it up to a week after exposure.
Hepatitis A And B Vaccine
|Combined hepatitis A and B vaccine
The combined vaccine is as safe and protective as if given as separate hepatitis A and B vaccines. It is generally well-tolerated. Common side effects are mild and include redness and pain at the injection site, where a small lump may appear. Feeling faint or tired, or a headache may occur. Other side effects include numbness, tingling, rash, bruising, abnormal bleeding such as from the nose or gums, weak muscle or pain. Severe side effects are rare and include an allergic reaction and seizures.
It is widely available.
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Are Hepatitis B Virus Infections Easily Avoided
Large quantities of hepatitis B virus are present in the blood of people with hepatitis B in fact, as many as one billion infectious viruses can be found in a milliliter of blood from an infected individual. Therefore, hepatitis B virus is transmitted in the blood of infected individuals during activities that could result in exposure to blood, such as intravenous drug use, tattooing, or sex with people who are infected. However, it is also possible to catch hepatitis B virus through more casual contact, such as sharing washcloths, toothbrushes or razors. In each of these cases, unseen amounts of blood can contain enough viral particles to cause infection. In addition, because many people who are infected don’t know that they are infected, it is very hard to avoid the chance of getting infected with hepatitis B virus.
Persons With Chronic Diseases
Refer to Immunization of Persons with Chronic Diseases in Part 3 for additional general information about vaccination of people with chronic diseases.
Chronic renal disease and patients on dialysis
People with chronic renal disease may respond sub-optimally to HB vaccine and experience more rapid decline of anti-HBs titres, and are therefore recommended immunization with a higher vaccine dose. Individuals undergoing chronic dialysis are also at increased risk for HB infection. In people with chronic renal disease anti-HBs titre should be evaluated annually and booster doses using a higher vaccine dose should be given as necessary.
People with conditions such as autism spectrum disorders or demyelinating disorders should receive all routinely recommended immunizations, including HB-containing vaccine.
Chronic liver disease
HB immunization is recommended for non-immune persons with chronic liver disease, including those infected with hepatitis C, because they are at risk of more severe disease if infection occurs. Vaccination should be completed early in the course of the disease, as the immune response to vaccine is suboptimal in advanced liver disease. Post-immunization serologic testing may be used to confirm vaccine response.
Non-malignant hematologic disorders
Persons with bleeding disorders and other people receiving repeated infusions of blood or blood products are considered to be at higher risk of contracting HB and should be offered HB vaccine.
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How To Get Vaccinated Against Hepatitis B
All babies in the UK born on or after 1 August 2017 are given 3 doses of hepatitis B-containing vaccine as part of the NHS routine vaccination schedule.
These doses are given at 8, 12 and 16 weeks of age.
Babies at high risk of developing hepatitis B infection from infected mothers are given extra doses of the hepatitis B vaccine at birth, 4 weeks and 1 year of age.
If you think you’re at risk and need the hepatitis B vaccine, ask your GP to vaccinate you, or visit any sexual health or genitourinary medicine clinic.
If your job places you at risk of hepatitis B infection, it’s your employer’s responsibility to arrange vaccination for you, rather than your GP. Contact your occupational health department.
Us Infant Hepatitis B Vaccine Schedules
*Please note that the first dose should be given as soon as possible. Additional doses require minimum time intervals between doses in order for the vaccine to be effective.
3-Dose Vaccine Series for Infants
Since 1991, ALL medically stable infants with a birth weight of at least 2,000 g in the U.S. are recommended to receive the first dose of hepatitis B vaccine within 24 hours of birth. The additional 2 doses are given at 1 month and 6 months of age.
4-Dose Vaccine Combination Series for Infants
Combination vaccines, such as the pentavalent and hexavalent vaccines, include protection against 5 or 6 diseases, including hepatitis B. The first shot is usually given at 6 weeks of age, but in order to protect infants from hepatitis B beginning at birth, a monovalent or single dose of the hepatitis B vaccine is also recommended within 24 hours of birth. The hepatitis B vaccine series can then be completed with the pentavalent or hexavalent vaccine with the recommended schedule.
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Persons With Inadequate Immunization Records
Evidence of long term protection against HB has only been demonstrated in individuals who have been vaccinated according to a recommended immunization schedule. Independent of their anti-HBs titres, children and adults lacking adequate documentation of immunization should be considered susceptible and started on an immunization schedule appropriate for their age and risk factors. Refer to Immunization of Persons with Inadequate Immunization Records in Part 3 for additional information.
What Are Side Effects Of Inactivated Viral Vaccines
Side effects of inactivated viral vaccines may include the following:
- Injection site reactions include:
Information contained herein is not intended to cover all possible side effects, precautions, warnings, drug interactions, allergic reactions, or adverse effects. Check with your doctor or pharmacist to make sure these drugs do not cause any harm when you take them along with other medicines. Never stop taking your medication and never change your dose or frequency without consulting your doctor.
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Dosage Forms & Strengths
belimumab decreases effects of hepatitis b vaccine by immunosuppressive effects risk of infection. Contraindicated. Do not administer live vaccines 30 days before or concurrently with belimumab.
Serious – Use Alternative
chloroquine decreases effects of hepatitis b vaccine by pharmacodynamic antagonism. Minor/Significance Unknown.
ozanimod decreases effects of hepatitis b vaccine by immunosuppressive effects risk of infection. Minor/Significance Unknown. No clinical data are available on the efficacy and safety of vaccinations in patients taking ozanimod. Vaccinations may be less effective if coadministered with ozanimod.
Does The Hepatitis B Vaccine Have Side Effects
Some children will develop pain or soreness in the local area of the shot, and low-grade fever.
There is one extremely rare, but serious, side effect. About 1 out of every 600,000 doses of the hepatitis B vaccine will cause a severe allergic reaction, called anaphylaxis, with symptoms including swelling of the mouth, difficulty breathing, low blood pressure or shock. Anaphylaxis usually occurs within 15 minutes of receiving the vaccine. Although anaphylaxis can be treated, it is quite frightening. People should remain at the doctors office for about 15 minutes after getting the vaccine.
Although the hepatitis B vaccine is made in yeast cells, no one has ever been shown to be allergic to the yeast proteins contained in the hepatitis B vaccine .
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Facts About Hepatitis B
- Two billion people, or one in three, have been infected with hepatitis B worldwide. Of these, almost 300 million live with chronic hepatitis B. This means about 1 of every 26 people throughout the world are living with a chronic hepatitis B infection.
- Each year about 900,000 people die from hepatitis B worldwide, and about 2,000 of these deaths occur in the United States.
- Hepatitis B is transmitted through blood and is 100 times more infectious than HIV. An estimated one billion infectious viruses are in one-fifth of a teaspoon of blood of an infected person, so exposure to even a very small amount, such as on a shared toothbrush, can cause infection.
- Hepatitis B is sometimes referred to as the silent epidemic because most people who are infected do not experience any symptoms.
- Liver cancer accounted for about 5% of cancer deaths in the U.S. during 2020.
- Almost half of liver cancers are caused by chronic infection with hepatitis B.
- The World Health Organization recommends the inclusion of hepatitis B vaccine in immunization programs of all countries in 2019, more than 8 of 10 infants born throughout the world received three doses of hepatitis B vaccine.
Other Reported Adverse Events And Conditions
While serious events and chronic illnesses such as chronic fatigue syndrome, multiple sclerosis, Guillain-Barré syndrome, rheumatoid arthritis and sudden infant death syndrome have been alleged or reported following HB vaccination, no evidence of a causal association has been demonstrated in a number of studies.
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Is It Okay To Get An Extra Dose Of Hepatitis B Vaccine
Yes. Although extra doses of vaccine are not recommended, you can think of the extra dose as another chance for the immune system to see the hepatitis B virus. A vaccine is not the only time the immune system will see the virus or bacteria contained in it. People may be exposed to the virus or bacteria at school or the store or when visiting family or friends. An extra dose of vaccine is like one more exposure, except the difference is that the virus or bacteria in any vaccine has been made safe, so it wont make you ill.
Guidance On Reporting Adverse Events Following Immunization
Vaccine providers are asked to report, through local public health officials, any serious or unexpected adverse event temporally related to vaccination. An unexpected AEFI is an event that is not listed in available product information but may be due to the immunization, or a change in the frequency of a known AEFI.
Refer to Reporting Adverse Events Following Immunization in Canada and Adverse events following immunization in Part 2 for additional information about AEFI reporting.
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I Am A Healthcare Worker Who Did Not Develop Hepatitis B Antibodies After Immunization What Should I Do
Two versions of hepatitis B vaccine are available. One, called Heplisav-B, contains a novel adjuvant that was not present in previous versions used by adults . Some people did not respond to the older version hepatitis B vaccine. In fact, in a group of adults younger than 40 years of age who received two doses of the older version vaccine 75 of 100 were protected. Following the third dose, this number increased to 90 of 100. However, people older than 40 years of age were less likely to respond to the vaccine with increasing age. On the other hand, 90 to 100 of 100 adults 18 years of age and older respond to Heplisav-B, which was approved for use in 2018.
About 5-10 of every 100 children and adults younger than 40 years of age do not respond to the third dose of the hepatitis B vaccine. Some of these people will be recommended to get vaccinated again. About 5 of 100 people will still not respond after getting all recommended doses of both series. Note that children younger than 18 years of age cannot get Heplisav-B.
If the people who do not respond to vaccination are determined not to have chronic hepatitis B, they will be reliant on taking precautions to reduce the chance of exposure and relying on those around them for protection. In other words, these people will be reliant on herd immunity.
What Is Hepatitis B Virus
Hepatitis B virus attacks the liver. Hepatitis B virus infections are known as the “silent epidemic” because many infected people don’t experience symptoms until decades later when they develop hepatitis , cirrhosis , or cancer of the liver . Every year in the United States about 22,000 new hepatitis B infections occur and about 2,000 people die from their infections.
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Why Should I Vaccinate My Newborn Child If I Know That I Am Not Infected With Hepatitis B Virus
Before the hepatitis B vaccine, every year in the United States about 18,000 children were infected with hepatitis B virus by the time they were 10 years old. This statistic is especially important because people are much more likely to develop liver cancer or cirrhosis if they are infected early in life, rather than later in life .
About 9,000 of the 18,000 children infected in the first 10 years of life caught the virus from their mother during birth. However, many young children didn’t catch the disease from their mother. They caught it from either another family member or someone else who came in contact with the child. Because hepatitis B can be transmitted by relatively casual contact with items contaminated with the blood of an infected person, and because many people who are infected with hepatitis B virus don’t know that they have it, it is virtually impossible to be “careful enough” to avoid this infection.
For these reasons, all young children are recommended to receive the hepatitis B vaccine. The best time to receive the first dose is right after birth. This will ensure that the child will be protected as early as possible from catching hepatitis B from people who dont know that they are infected with the virus.
Listen to Dr. Offit explain why newborns get the hepatitis B vaccine by watching this short video, part of the series Talking About Vaccines with Dr. Paul Offit.
General Information About Vaccination Outside The Us
In developing countries, the pentavalent vaccine, a combination 5-in-one vaccine that protects against five diseases, diphtheria, pertussis, tetanus, Hib and hepatitis B, may be given to babies more than 6 weeks of age, and can be given up to 1 year of age. The first dose is given at 6 weeks, and the second and third doses are given at 10 and 14 weeks of age. The pentavalent vaccine may be made available free of charge with the support of GAVI, the vaccine alliance. Check the GAVI country hub to see the resources and immunizations that may be available:
For babies born to mothers with hepatitis B, waiting for the first dose of the pentavalent vaccine is too late and will NOT protect the baby from vertical or horizontal transmission of hepatitis B. Babies born to a mother with hepatitis B have a greater than 90% chance of developing chronic hepatitis B if they are not properly treated at birth.
WHO recommends the hepatitis B vaccine within 24 hours of birth for ALL babies. Plan ahead and inquire about the availability and cost of the monovalent , birth dose of the vaccine, as it is not a GAVI provided immunization. This is particularly important to women who are positive for hepatitis B.
If you are unsure of your hepatitis B status, please be sure your doctor tests you for hepatitis B!
*WHO does not recommend a birth dose of HBIG, which may not be available in all countries. Talk to your doctor if you have questions.
Page updated September 2022.
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