How often do you need hepatitis b vaccine

Who Should Get the Hepatitis A Vaccine?

The CDC recommends that all children between ages 12 months and 23 months get this vaccine as well as for any infant aged 6 to 11 months who is traveling internationally.  

The following people are also at risk for the disease and should be vaccinated:

• Children and teens through age 18 who live in states or communities that have made this vaccination routine because of a high rate of disease
• Men who have sex with men
• Anyone who uses illegal drugs
• People with chronic (long-term) liver disease
• Anyone treated with blood clotting drugs, such as people with hemophilia
• People who work with HAV-infected primates or in HAV research laboratories. (HAV is like HIV in animals.)
• Travelers to countries where hepatitis A is common. A good source to check is the CDC’s travelers’ health website, which you can search by the country you’re going to.
• People adopting or close to a child adopted from a country where hepatitis A is common

You should not get the vaccine if you're allergic to any ingredients in it or if you had a severe allergic reaction to an earlier dose of it. Tell your doctor or pharmacist about any allergies you have.

If you're pregnant, let your doctor know. The safety of this vaccine for pregnant women is unknown, although the risk is considered to be very low.

Who Should Get the Hepatitis B Vaccine?

The CDC recommends it for all babies, who should get their first dose as newborns. 

Other people who need it include:

• People younger than age 19 who haven't been vaccinated
• Anyone who has a sex partner with hepatitis B
• People who are sexually active but aren’t in a long-term relationship in which both partners are monogamous
• Anyone being evaluated or treated for an STD
• Men who have sex with men
• People who share needles used to inject drugs
• Anyone who lives with someone who has hep B
• Anyone whose job routinely puts them at risk for coming in contact with blood or blood-contaminated body fluids
• People with end-stage kidney (renal) disease
• People who live and work in facilities for people who are developmentally disabled
• Travelers to regions with moderate to high rates of hepatitis B
• People with chronic liver disease
• People with HIV infections

You should not get the vaccine if you had a severe allergic reaction to an earlier dose or are allergic to yeast, because yeast is used to make the vaccine.

How and When Do Doctors Give Vaccines?

For the hepatitis A vaccine:

You should get two doses, given as shots, 6 months apart for complete protection. The virus in the vaccine is killed (inactive).

Children should get the first dose between 12 and 23 months of age. Children older than age 2 can get the first dose at their next doctor’s visit.

If you need the vaccine because of upcoming travel, get it at least 1 month before you go.

For the hepatitis B vaccine:

For long-lasting immunity, you need three to four doses, depending on which type of vaccine is used. You get them as shots.

Children should get their first dose at birth and complete the series by age 6 months. Usually, the baby would get a second dose at 1 month old and the third dose at 6 months.

Babies born to women who have hepatitis B need a shot of hep B antibodies, as well as their first hep B vaccine shot, when they’re born. They will also need follow-up blood tests to make sure they’re OK.  

Catch-up vaccinations are recommended for children and teens who were never vaccinated or who did not get all three shots.

If you're an adult who wants to be vaccinated, you should talk about it with your doctor or pharmacist. If you are considering both vaccines, ask your doctor about vaccines that combine hep A and B.

If you wish to ensure you have generated adequate immunity, and are protected, you can have your anti-HBs (HBsAb) titres checked 4-8 weeks following the last shot of the hepatitis B vaccine series.  If your titer is greater than 10 mIU/mL, then you have adequate immunity which is thought to confer lifetime immunity, but studies so far show 30 years.  This is because these studies are on-going!

Please note that checking anti-HBs titres is not generally recommended for all vaccine recipients, with the exception of those that are at greater risk of infection.   This includes but is not limited to health care workers, those with sexual partners with hepatitis B, and those living in a household where someone is infected. Talk to your doctor if you think you might be at higher risk and need to have your titres checked.

So what happens if you go for shot one, followed by shot two in a month, but you never get to shot three?  The minimum length of time between the three shots in the series is 0, 1 month, and 6 months.  This is the schedule recommended for the shortest amount of time, with the best immune response for the general population.  However, if you don’t get to shot three of the series for another two years, or if you never got to shot two, you can resume right from where you left off, and continue without the need for repeating the series. Just remember that you are not fully protected until you have completed the series.

Here is a rule to remember the minimum time in between shots in the series:

Dose 2 should be separated by dose 1 by at least one month (4 weeks or 28 days)

Dose 3 should be separated by dose 2 by at least 2 months (8 weeks) AND from dose 1 by at least 4 months (16 weeks).

Keep in mind that the goal is to get people protected in the shortest amount of time, with the fewest number of doses. If you do not complete the series, you will not have adequate, longterm protection from hepatitis B.

What happens if you don’t have your vaccine records, and you have no idea if you ever got shot 1 or 2, and you just want to repeat the series? There is no concern with repeating the HBV vaccine series, so if you are unsure, please start the series from shot 1.

What about an accelerated schedule? Generally doctors advise against an accelerated schedule since it requires a 4th dose in order to provide long term protection. It’s hard enough to get people to adhere to the 3-shot schedule. Planning for a 4th dose in a year is a challenge.

What happens if you are pregnant; is it safe to get vaccinated? Absolutely yes!

What do you do while you’re waiting to complete the series? Be sure to take basic precautions avoiding direct contact with infected blood and practice safe sex.

Be sure you and your loved ones vaccinated are against hepatitis B so you can be hepatitis B free for life!

How many times in life do you need hep B vaccine?

Do adults need Hep B vaccine again?

Is hepatitis B vaccine once per lifetime?

How often is hep B vaccine given to adults?