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Inactivated Influenza Vaccine: Brands, Price & Uses in Bangladesh
Approved Indication Inactivated Influenza Vaccine is indicated for the active immunization of individuals against influenza disease caused by the influenza virus subtypes A and B strains contained…
About Inactivated Influenza Vaccine
Indications of Inactivated Influenza Vaccine
Approved Indication
Inactivated Influenza Vaccine is indicated for the active immunization of individuals against influenza disease caused by the influenza virus subtypes A and B strains contained in the vaccine. It is approved for annual seasonal use in eligible age groups (typically from 6 months of age and older, depending on the specific licensed product).
Guideline-Supported Use
- Routine annual vaccination is recommended by WHO and national immunization advisory bodies for all persons above the minimum eligible age who have no contraindication, particularly before the start of the local influenza season.
- Preferentially recommended (over live attenuated influenza vaccine) for pregnant women, immunocompromised individuals, and close contacts of severely immunocompromised persons, because Inactivated Influenza Vaccine does not contain live virus.
- Prioritized for high-risk groups: adults 65 years and older, individuals with chronic cardiac, pulmonary, renal, hepatic, metabolic (including diabetes), or neurologic conditions, residents of long-term care facilities, healthcare workers, and children 6–59 months of age.
What It Does Not Do
Inactivated Influenza Vaccine protects only against the specific influenza strains included in that season's formulation; it does not protect against other respiratory viruses (e.g., common cold viruses, COVID-19) and does not treat an influenza infection that has already started.
Dosage & Administration of Inactivated Influenza Vaccine
Route of Administration
Inactivated Influenza Vaccine is given as an intramuscular (IM) injection, preferably into the deltoid muscle in older children and adults, or the anterolateral thigh in infants and younger children. It should never be given intravenously.
Dosing by Age Group
| Age Group | Dose | Number of Doses |
|---|---|---|
| 6–35 months | 0.25 mL or 0.5 mL (per specific product labeling) | 1 or 2 doses (see below) |
| 3–8 years | 0.5 mL | 1 or 2 doses (see below) |
| 9 years and older (including adults) | 0.5 mL | 1 dose annually |
| Adults 65 years and older | 0.5 mL (standard-dose or a high-dose/adjuvanted product where available) | 1 dose annually |
Two-Dose Priming Schedule (Children 6 months–8 years)
Children aged 6 months through 8 years who are receiving an influenza vaccine for the very first time in their life require two doses, given at least 4 weeks apart, for adequate priming of the immune response. Children in this age range who have previously received two or more total doses of any seasonal influenza vaccine in prior seasons need only one dose per season thereafter.
Annual Revaccination
Because circulating strains change and immunity wanes, Inactivated Influenza Vaccine should be repeated every year, ideally before the start of the local influenza season, using that season's updated formulation.
Side Effects of Inactivated Influenza Vaccine
Very Common / Common
- Injection site pain, redness, swelling, or induration
- Low-grade fever
- Myalgia (muscle aches) and headache
- Fatigue or malaise
- Irritability or reduced appetite in young children
These reactions are generally mild and self-limited, resolving within 1–2 days without treatment. Because Inactivated Influenza Vaccine contains no live virus, it cannot cause influenza illness; any concurrent respiratory infection around the time of vaccination is coincidental.
Uncommon / Rare
- Generalized allergic reactions such as urticaria (hives) or angioedema
- Transient lymphadenopathy
Rare but Serious
- Anaphylaxis (rare, typically within minutes of injection)
- Guillain-Barré syndrome has been reported very rarely in temporal association with influenza vaccination (approximately 1–2 additional cases per million doses); a causal link is not established in most seasons but is monitored closely.
Contraindications of Inactivated Influenza Vaccine
Inactivated Influenza Vaccine is contraindicated in individuals with:
- A history of a severe allergic reaction (e.g., anaphylaxis) to a previous dose of any influenza vaccine.
- A known severe hypersensitivity to any component of the specific Inactivated Influenza Vaccine formulation being used (e.g., a component-specific allergy confirmed by a healthcare provider).
These are the only true absolute contraindications. Conditions such as egg allergy, a prior history of Guillain-Barré syndrome, or current mild illness are precautions requiring individualized risk-benefit assessment rather than absolute contraindications — see Precautions and Warnings.
Frequently Asked Questions about Inactivated Influenza Vaccine
What is Inactivated Influenza Vaccine used for?
Inactivated Influenza Vaccine is used to protect against seasonal influenza (flu) caused by the specific influenza A and B virus strains included in that year's vaccine formulation. It is given as an annual injection, ideally before the influenza season begins.
Can Inactivated Influenza Vaccine give me the flu?
No. Inactivated Influenza Vaccine contains inactivated (killed) virus particles that cannot replicate or cause infection, so it cannot give you influenza. Some people experience mild, short-lived side effects like soreness at the injection site, low-grade fever, or muscle aches, which are the immune system's normal response and not an actual flu infection.
Who should not receive Inactivated Influenza Vaccine?
Inactivated Influenza Vaccine should not be given to anyone who has had a severe allergic reaction (such as anaphylaxis) to a previous dose of any influenza vaccine, or to any component of the specific vaccine being used. People with a history of Guillain-Barré syndrome within 6 weeks of a prior flu vaccine, or those who are currently moderately to severely ill, should discuss timing and suitability with their physician before receiving Inactivated Influenza Vaccine.
Is Inactivated Influenza Vaccine safe during pregnancy and breastfeeding?
Inactivated Influenza Vaccine is routinely recommended during pregnancy, in any trimester, because pregnant women face a higher risk of severe influenza complications, and it is also considered compatible with breastfeeding. As with any vaccine in pregnancy or lactation, use should be guided by a physician, weighing the clear benefits against any theoretical risk.
Can I have an egg allergy and still receive Inactivated Influenza Vaccine?
Most people with egg allergy, even severe egg allergy, can safely receive an age-appropriate dose of Inactivated Influenza Vaccine; however, those with a history of a severe allergic reaction to egg should be vaccinated in a medical setting where severe allergic reactions can be promptly recognized and managed. Egg-free formulations are available in some markets as an alternative.
How often do I need to get Inactivated Influenza Vaccine?
Inactivated Influenza Vaccine should be repeated once every year, because the specific influenza strains it protects against are updated annually to match circulating viruses, and protective immunity wanes over time. Children aged 6 months to 8 years receiving it for the very first time need two doses, at least 4 weeks apart, in that first season.
Disclaimer
The information provided is accurate to the best of our knowledge, but it does not replace professional medical advice. We cannot guarantee its completeness or accuracy, and the absence of specific information about a drug should not be taken as an endorsement. We are not responsible for any consequences arising from this information, so please consult a healthcare professional for any concerns or questions.