Anthropometric Measurements as Predictors of Low Birth Weight Among Tanzanian Neonates: A Hospital-Based Study
November 7, 2025
Brand Name :
Vaqta, Havrix
Synonyms :
hepatitis A vaccine inactivated
Class :
Vaccines, Inactivated, Viral; Vaccines, Travel
Dosage Forms & StrengthsÂ
Injectable Solution (IM)Â
50 units/mLÂ
1440 ELISA units/mLÂ
Indicated as a proactive immunization for anyone looking for protection or who may be susceptible to contracting a HAV infection
At-risk populations such as those with chronic liver disease, homosexuals (men), abandoned persons, HIV infection, drug use (injection or oral), research subjects who have hepatitis A virus, traveling to endemic countries with high or medium HAV infection, close association with international individuals from countries of high or medium risk of HAV infection after their arrival within first two months of contact, risk of infection during pregnancy, exposure settings if any
Subjects with international adoptee exposure contact need to get the first dose within two weeks before arrival from their country, which has a high or medium risk of HAV infection
Adults who are above 19 years should receive a single 1-mL dosage for their primary immunization, followed by a booster dose given at any time between six and twelve months later
The deltoid region is where adults should receive the injection
Travelers who need protection against HAV infection pre-exposure should receive 1 mL IM two weeks before their travel to countries with a risk of HAV infection
The primary dose needs to be administered to individuals who are not vaccinated once the travel is scheduled, and a two-dose series needs to be completed according to the regular schedule
For immunocompromised individuals such as those with chronic liver disease or who are above 40 years or older, immune globulin needs to be considered for administration as an adjunctive
Prophylaxis for post-exposure individuals for HAV infection is 1 mL via IM as a primary dose, and if ACIP guidelines follow, a two-dose series needs to be completed
Above 40 years, individuals need to get an additional immunoglobulin
Immunocompromised individuals need to get a two-dose vaccine series along with immunoglobulin
Dose Adjustments
For immunocompromised individuals such as those with chronic liver disease or who are above 40 years or older, immune globulin needs to be considered for administration as an adjunctive
Dosage Forms & StrengthsÂ
Injectable Solution (IM)Â
25 units/0.5 mL (Vaqta)Â
720 ELISA units/0.5 mL (Havrix)Â
Recommended as a regular immunization for kids who are at least 12 months old (ACIP guidelines)
Less than 12 months: Not recommended; if given, does not count toward the standard 2-dose series
In children between 12 months and 18 years old, a two-dose series is recommended, with a primary dose of 0.5 mL administered IM and a booster dose given six or 12 months after the first dose (Havrix)
The booster dose is given either six or 18 months after the first dose
Those who are not immune to HAV infections must adhere to a catch-up regimen that calls for a 6-to 18-month gap between doses in order to receive vaccinations
The recommended dosing interval of six months must be adhered to at minimum
In order to protect themselves against HAV infection prior to travel, travellers should receive immunoglobulin if they are younger than six months old and should not receive a conventional two-dose series
For children between six and eleven months, they should receive 0.5 mL of immunoglobulin
Children who have not received a prior vaccination and are between the ages of one and eighteen must receive 0.5 mL and finish a two-dose series
Immunoglobulin and vaccination administration is recommended for immunocompromised patients
If ACIP recommendations be followed, a two-dose series must be finished as prophylaxis for HAV infection in post-exposure individuals aged 1 to 18 years who have not received a prior vaccination
The initial dose is 0.5 mL by intramuscular injection
Immunocompromised people require immunoglobulin in addition to a two-dose vaccination schedule
International traveling individuals to endemic countries with high or medium risk for HAV infection who are 6 and 11 months should receive a dose before travel, and after six months, between 1 year and two years, individuals revaccination with the next dose
Children above one year need to get the first dose ASAP when travel is scheduled and 2nd dose after six months if not vaccinated previously
For immunocompromised individuals such as those with chronic liver disease or who are above 40 years or older, immune globulin needs to be considered for administration as an adjunctive.Â
when used with abatacept, the Hepatitis A Vaccine's therapeutic efficacy may be compromised
when hepatitis a vaccine inactivated is combined with melphalan the therapeutic efficacy of the vaccine decreases by antagonism
vaccines are not recommended, oncological agents may diminish the therapeutic effects of the vaccines
combining vorinostat with the Hepatitis A Vaccine may reduce its therapeutic efficacy
combining zidovudine with the Hepatitis A Vaccine may reduce its therapeutic efficacy
combining sulfasalazine with the Hepatitis A Vaccine may reduce its therapeutic efficiency
when used with sarilumab, the Hepatitis A Vaccine's therapeutic efficacy may be lowered
Actions and Spectrum:Â
Actions:Â
The way the inactivated hepatitis A vaccine functions is by inducing the production of antibodies by the immune system, which will neutralize and eliminate the virus and end the hepatitis A illness.Â
Spectrum:Â
Preventing hepatitis A virus (HAV) infection is the main goal of the inactivated hepatitis A vaccination. The liver is impacted by the viral virus hepatitis A, which is usually contracted by consuming tainted food or water. Long-term immunity, decreased illness severity, outbreak prevention, herd immunity, travel medicine, integration into regular immunization schedules, post-exposure prophylaxis, protection in high-risk groups, safe and well-tolerated are all included in the range.Â
Frequency definedÂ
>10%Â
Fever (9-11%)Â
Erythema (1-22%)Â
Swelling (9-11%)Â
Injection site tenderness (3-56%)Â
Warmth (1-17%)Â
Anorexia (1-19%)Â
Irritability (11-36%)Â
Headache (1-16%)Â
1-10%Â
Crying (2%)Â
Diarrhea (1-6%)Â
URI (1-10%)Â
Rhinorrhea (6%)Â
Otitis media (8%)Â
Rash (1-5%)Â
Fever (3%)Â
Cough (1-5%)Â
Vomiting (1-4%)Â Â
<1%Â
VertigoÂ
HematomaÂ
PhotophobiaÂ
Raised CPKÂ
Black Box Warning:Â
If you have a known allergy to any of the vaccine’s ingredients or any other products, notify your doctor before receiving this shot. Patients with an acute febrile illness will not get hepatitis A vaccine inactivated.
Inform your physician if you are expecting or nursing a child. Women who are expecting or nursing should not receive the vaccination unless necessary.Â
Contraindication/Caution:Â
ContraindicationsÂ
CautionsÂ
Pregnancy consideration:Â Â
No data is available regarding the administration of the drug during pregnancy.Â
Breastfeeding warnings:Â Â
No data is available regarding the excretion of drug in breast milk.Â
Pregnancy category:Â
Category A: well-controlled and satisfactory studies show no risk to the fetus in the first or later trimester.Â
Category B: there was no evidence of risk to the fetus in animal studies, and there were not enough studies on pregnant women.Â
Category C: there was evidence of risk of adverse effects in animal reproduction studies, and no adequate evidence in human studies must take care of potential risks in pregnant women.   Â
Category D: adequate data with sufficient evidence of human fetal risk from various platforms, but despite the potential risk, and used only in emergency cases for potential benefits.   Â
Category X: Drugs listed in this category outweigh the risks over benefits. Hence these categories of drugs need to be avoided by pregnant women.   Â
Category N: No data is available for the drug under this category.Â
Pharmacology:Â
Hepatitis A virus (HAV) attenuated strain that promotes active immunityÂ
Pharmacodynamics:Â
The picornavirus family includes the virus that causes hepatitis A. It is one of several hepatitis viruses that can lead to liver damage and systemic illness.Â
Hepatitis A typically takes 28 days to incubate (range: 15 to 50 days).1. Hepatitis A infections can progress from asymptomatic illness to icteric hepatitis and even death, due to their incredibly varied nature.Â
Antibodies against HAV offer defense against hepatitis A infection. The lowest titer required to provide protection hasn’t been identified, yet.Â
Pharmacokinetics:Â
N/AÂ
Administration:Â
Dilution not considered.Â
Before administering, give the vial or syringe a good shake to produce a somewhat opaque, white solution.Â
If the suspension doesn’t seem uniform, there are still extraneous particles present, or there is visible discoloration, discard.Â
Administer in the deltoid region to adults, adolescents, and children under the age of two.Â
Children between the ages of 12 and 23 months: Apply to the outside of the thigh.Â
At 2–8°C (36–46°F), refrigerate. Â
If the vaccination has been frozen, discard it immediately as freezing reduces its efficacy.Â
Patient information leafletÂ
Generic Name: hepatitis A vaccine inactivatedÂ
Pronounced: heh-puh-TY-tis A vax-EEN in-AK-tuh-vey-tedÂ
Why do we use hepatitis A vaccine inactivated?Â
vaccination containing an inactivated virus. The purpose of the inactivated hepatitis A virus vaccine is to induce active immunity to HAV infection by containing attenuated, cell culture-adapted hepatitis A virus (HAV).Â