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compositionComposition:JAPANESE ENCEPHALITIS VACCINE INACTIVATED-5MCG
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Prescription Medicine
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Jenvac Vaccine is used to prevent Japanese encephalitis (infection of the brain). It contains inactivated whole virus vaccine which works by providing immunity or resistance against the virus. In some cases, this medicine may cause side effects such as fever, muscle pain, nausea, tenderness and pain at the injection site. Inform the doctor if you are pregnant or breastfeeding, taking any other medication, or have any pre-existing medical conditions.

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Written By Veda Maddala , M Pharmacy
Reviewed By Dr Aneela Siddabathuni , MPharma., PhD
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More about the Product

Composition :

JAPANESE ENCEPHALITIS VACCINE INACTIVATED-5MCG

Manufacturer/Marketer :

Bharat Biotech

Consume Type :

Parenteral

Expires on or after :

Jan-27

Return Policy :

Not Returnable

About Jenvac Vaccine

Jenvac Vaccine is an injectable vaccineis an injectable vaccine used to protect adults and children from Japanese encephalitis, a serious viral brain infection spread by mosquito bites that can cause inflammation of the brain, permanent neurological damage, or even death in severe cases.

It is primarily recommended for individuals travelling to or living in areas where the virus is common, such as certain parts of South, Southeast, and East Asia, including endemic regions of India such as Uttar Pradesh, Bihar, Assam, and West Bengal. This vaccine helps your body build its own natural defences against the virus before you are exposed.

This vaccine is given as a series of injections by a healthcare professional, and completing the full schedule is essential to ensure long-term protection. Since it is injected, it does not have any food restrictions, but staying well-hydrated and rested before your appointment can help you feel better after the injection. Combining the vaccine with personal mosquito protection measures, like using insect repellent and wearing protective clothing, provides the best defence against infection.

Most people experience only mild, temporary side effects, such as soreness at the injection site, headache, or muscle aches. However, if you develop severe symptoms such as difficulty breathing or swelling of the face or throat, get medical help straight away. Serious reactions are rare and can usually be treated promptly. Talk to your doctor or pharmacist if your mild symptoms do not go away within a few days.

Do not take this if you have had a severe allergic reaction to a previous dose of this vaccine or any of its ingredients. Talk to your doctor before receiving this vaccine if you have an ongoing high fever, a weakened immune system due to illness or medical treatments, a history of severe allergies, or neurological or autoimmune conditions. Your healthcare provider will help decide if it is safe for you to receive the shot.

Immunosuppressant medications can lower the effectiveness of this vaccine by preventing your body from building a strong immune response. It is also important to avoid heavy alcohol consumption around your vaccination dates to help your body rest and recover. 

If you are pregnant, breastfeeding, or planning a trip for an elderly family member, consult your doctor or pharmacist to discuss whether this vaccine is appropriate.

Uses of Jenvac Vaccine

Jenvac Vaccine helps protect against Japanese encephalitis by preparing your immune system to recognise and fight the virus before it can cause serious illness. Its primary use includes:

  • Prevention of Japanese encephalitis: Jenvac Vaccine stimulates the body's immune system to produce antibodies that target and neutralise the Japanese encephalitis virus, preventing a potentially life-threatening brain infection.

Key Benefits

Receiving Jenvac Vaccine offers critical health benefits, especially for those visiting or residing in high-risk regions:

  • High level of protection: By completing the injection series, you gain highly effective immunity against a severe disease that has no specific antiviral cure.
  • Safe travel and peace of mind: Receiving Jenvac Vaccine allows travellers, military personnel, and outdoor workers to visit rural or agricultural areas with reduced anxiety about mosquito-borne brain infections.
  • Long-lasting defence: After completing the recommended vaccination schedule, this vaccine provides long-lasting protection against Japanese encephalitis. The duration of protection and the need for a booster dose vary depending on the vaccine used and your ongoing risk of exposure. Your doctor will advise if and when a booster dose is needed.  

Directions for Use

  • Jenvac Vaccine is typically administered in two doses, 28 days apart, or as directed by the doctor or healthcare professional.
  • Jenvac Vaccine will be administered by the doctor/healthcare professional.
  • Do not self-administer.

How Jenvac Vaccine Works

Jenvac Vaccine helps your immune system recognise and fight the Japanese encephalitis virus before it can cause illness. Japanese encephalitis vaccine inactivated is an inactivated vaccine, meaning it contains killed particles of the Japanese encephalitis virus. Because the virus is inactive, it cannot cause the actual illness. When the vaccine is injected, your immune system recognises these harmless viral components as foreign invaders and produces specific protective proteins called antibodies. If you are later bitten by an infected mosquito, your immune system will recognise the virus immediately and use these pre-made antibodies to destroy it before it can cause a serious brain infection.
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Alcohol

Caution

It is not known if Jenvac Vaccine is affected by alcohol intake. Please consult your doctor for more information.

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Pregnancy

Caution

Jenvac Vaccine is not recommended during pregnancy and may have harmful effects on the developing baby. Please consult your doctor before taking Jenvac Vaccine if you are pregnant or planning to conceive.

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Breast Feeding

Caution

Jenvac Vaccine should be used with caution during breastfeeding. Please consult your doctor before taking Jenvac Vaccine if you are a breastfeeding mother.

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Driving

Caution

Jenvac Vaccine may cause tiredness and weakness. Do not drive if you experience any symptoms that affect your ability to drive or operate machinery.

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Liver

Safe if prescribed

Jenvac Vaccine is safe if prescribed by your doctor. Please consult your doctor if you suffer from severe liver impairment/liver disease.

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Kidney

Safe if prescribed

Jenvac Vaccine is safe if prescribed by your doctor. Please consult your doctor if you suffer from severe kidney impairment/kidney disease.

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Children

Caution

Jenvac Vaccine is recommended for use in children only after the doctor's advice. Jenvac Vaccine is not indicated for use in infants below two months.

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Heart

Caution

Jenvac Vaccine should be administered with caution in patients with heart problems. Please inform your doctor if you have any pre-existing heart problems before receiving Jenvac Vaccine .

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Geriatrics

Caution

Limited information is available regarding the use of Jenvac Vaccine in elderly patients. If you have any concerns about the usage of Jenvac Vaccine in geriatrics, please consult your doctor.

What if I have taken an overdose of Jenvac Vaccine

Since this vaccine is prepared and injected by a healthcare professional in a controlled medical setting, an overdose is highly unlikely. If you believe you have received an incorrect dose or are experiencing severe, unusual symptoms after injection, seek immediate medical attention. In an emergency, call your local emergency services or go to the nearest hospital.

Diet & Lifestyle Advise

  • Avoid mosquito bites: Even after vaccination, practice strict mosquito avoidance by using insect repellents containing DEET, picaridin, or IR3535 on exposed skin.
  • Wear protective clothing: Wear long-sleeved shirts, long pants, and socks when outdoors, especially during dusk and dawn when the mosquitoes that transmit the virus are most active.
  • Stay hydrated: Drink plenty of water before and after your vaccination to help your body manage mild side effects like a low-grade fever or headache.
  • Rest after injection: Allow your body time to rest for 24 hours after receiving Jenvac Vaccine to support your immune system's response to the vaccine.

Health Queries

At what age should the brain fever vaccine be given to a child, and is it necessary?

Veda Maddala

Veda Maddala

M Pharmacy

"Brain fever" usually refers to conditions like Japanese Encephalitis (JE) or Meningitis. The JE vaccine is highly recommended, especially in endemic regions, and is typically given in two doses: the first at 9 to 12 months of age, and the second at 16 to 24 months. Other vaccines that prevent meningitis (such as Hib, Pneumococcal, and Meningococcal vaccines) are started as early as 6 to 8 weeks of age. These vaccines are absolutely necessary because they protect children from life-threatening brain infections that can cause permanent brain damage or hearing loss. Please consult your pediatrician for the exact schedule recommended in your area.
health query

Have a query?

How Soon It Starts Working

The time required for Jenvac Vaccine to start to work: The time required for Jenvac Vaccine to show its action is unknown. The time for which the effects of Jenvac Vaccine last: The duration of action for Jenvac Vaccine is clinically unknown.

What if you forget to take Jenvac Vaccine

If you miss a scheduled appointment for a follow-up injection, contact your clinic or healthcare provider immediately to reschedule. Completing the full series is necessary to ensure adequate protection, so do not skip doses. Talk to your doctor or pharmacist if you are unsure about your vaccination schedule.

Storage

•Jenvac Vaccine must be stored in a refrigerator between 2°C and 8°C (36°F to 46°F).• Do not freeze this vaccine, as freezing destroys its effectiveness; if it has been frozen, it must be discarded immediately.
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Keep Refrigerated. Do not freeze.Prepaid payment required.

Drug Warnings

  • Verify the vaccine appearance: Before injection, ensure your healthcare provider inspects the vial. Do not use the vaccine if it contains unusual particles or appears discoloured.
  • Complete the full course: Ensure you receive all recommended doses in the series before travelling, as a single dose may not provide sufficient protection against the virus.
  • Plan ahead: Schedule your first injection at least several weeks before your trip, as your body needs time to build up immunity after the final dose.
  • Report bleeding disorders: Tell your doctor if you have a bleeding disorder or are taking blood thinners, as you may experience bruising or bleeding at the injection site.
  • Stay for observation: Wait in the clinic for 15 to 30 minutes after your injection so healthcare staff can assist you if you experience an immediate allergic reaction.

verifiedApollotooltip

Inform your doctor if you are taking any of the following medicines, as they may interact.

  • Immunosuppressive therapies: Medicines that weaken your immune system, such as chemotherapy, high-dose steroids, or radiation therapy, may reduce your body's ability to develop protective antibodies from Jenvac Vaccine . Talk to your doctor if you are receiving any of these treatments.

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verifiedApollotooltip
  • There are no known food or drink interactions with Jenvac Vaccine . However, avoiding heavy alcohol consumption around your injection date can help prevent dehydration and may reduce the severity of mild side effects such as headache and fatigue. 

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Habit Forming

No

Therapeutic Class

[IMMUNIZING AGENTS]

FAQs

Jenvac Vaccine contains inactivated Japanese encephalitis virus. When injected, Jenvac Vaccine releases a small dose of virus or its protein into the body, which further provides immunity against Japanese encephalitis disease.
Jenvac Vaccine should be used with caution in the medical history of severe allergic reactions to vaccines, immune system disorders, fainting, bleeding disorders, blood clots, and fits. Please let your doctor know if your child has any other medical problems before starting Jenvac Vaccine .
If you have shown a severe allergic reaction after the first shot, you should not get the next shot since it can be life-threatening. Please consult your doctor for more information.
You can take other vaccines along with Jenvac Vaccine if you do not have any allergic reactions. If you take other vaccines and Jenvac Vaccine , they should be given by separate syringes and at different injection sites.
You may experience flu-like symptoms and fever after getting vaccinated with Jenvac Vaccine . This is a common side effect that occurs after every vaccine. Your fever gradually decreases after 1-2 days. Your doctor may also suggest fever and pain medication if required. However, if the fever persists after three days, please reach out to your doctor.
If you have a mild cold without a fever, you can usually receive the vaccine. However, if you have a high fever or a more severe illness, it is best to wait until you recover before getting the injection. Talk to your doctor to determine if you should delay your shot.
While there is no direct interaction between alcohol and the vaccine, alcohol can dehydrate you or worsen mild side effects like headaches and fatigue. It is best to avoid heavy drinking for a couple of days after your shot to help your body rest.
Yes, you must still use mosquito repellent and protective clothing. No vaccine is 100% effective, and mosquitoes in tropical areas can also carry other dangerous infections like dengue or malaria, for which this vaccine does not protect. Talk to your doctor or pharmacist about effective mosquito prevention.
This vaccine is generally only recommended during pregnancy or breastfeeding if the risk of contracting the virus is high and travel cannot be avoided. Your healthcare provider will weigh the benefits of protection against any potential risks. Talk to your doctor if you are pregnant or breastfeeding.
Mild soreness, redness, or swelling at the injection site is very common and usually goes away on its own within a few days. You can apply a cold, damp cloth to the area to help ease the discomfort and keep moving your arm gently. If the soreness worsens after a few days or becomes severe, talk to your doctor.

Disclaimer

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Country of origin

INDIA

Manufacturer/Marketer address

Genome Valley Shameerpet, Hyderabad – 500 078 Telagana INDIA
Other Info - JEN0009

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