Covaxin Vaccine

Covaxin Vaccine is a whole virion, inactivated COVID-19 vaccine designed to prevent infection caused by SARS-CoV-2. The vaccine uses virus particles that have been killed or inactivated so they cannot replicate or cause disease, but still trigger the immune system to recognise the virus. It is typically administered as an intramuscular injection and helps the body develop immunity to COVID-19.

Covaxin Vaccine is indicated for active immunisation to prevent COVID-19 in individuals looking to develop protective antibodies against the SARS-CoV-2 virus.

This vaccine utilises a traditional, well-established platform for immune system training:

• The Platform: The vaccine contains the entire SARS-CoV-2 virus that has been grown in controlled laboratory cell cultures and then completely inactivated (killed) using a chemical agent (such as beta-propiolactone). Because the virus is dead, it cannot replicate or cause COVID-19 disease.

• Immune Response: Because the vaccine presents the "whole virion" (the complete virus particle) to the immune system, the body develops an immune response not just to the outer spike protein, but also to other structural proteins of the virus, such as the nucleocapsid and membrane proteins. This simulates a natural infection and prompts the creation of neutralising antibodies and specialised T cells.

• Adjuvants: This formula frequently includes an adjuvant (such as an aluminium-based compound) to help boost and prolong the body's immune response to the inactivated virus.

Because this vaccine exposes the body to a wide array of viral antigens rather than just a single isolated protein, it provides a broad base for immune recognition. It is administered via an intramuscular injection.

This vaccine is used for:

• Active immunisation to prevent COVID-19 caused by the SARS-CoV-2 virus.

• Provides protection against COVID-19 infection.

• Reduces the risk of severe disease, hospitalisation, and death.

• Stimulates both antibody and T-cell immune responses.

• Cannot cause COVID-19 since the virus is inactivated.

• Can be used safely in large populations due to proven inactivated vaccine technology.

• Contributes to community (herd) immunity.

Covaxin Vaccine may cause side effects in some people. Most are mild and temporary, but contact your doctor if they persist, worsen, or if you experience any serious reactions.

Common Side Effects

• Injection site reactions: Pain, redness, swelling, or tenderness at the site of injection.

• Fever or chills: Mild to moderate increase in body temperature.

• Fatigue or malaise: Feeling unusually tired or weak.

• Headache

• Muscle or joint aches (myalgia/arthralgia)

• Nausea or mild digestive discomfort

Uncommon Side Effects

• Dizziness or light-headedness

• Swollen lymph nodes

• Loss of appetite

Serious / Very Rare Side Effects (Require Immediate Medical Attention)

• Severe allergic reactions (anaphylaxis): Rash, hives, swelling of the face/lips/tongue/throat, or difficulty breathing.

• Neurological reactions (very rare): Facial weakness, tingling, or paralysis.

• Other serious systemic reactions: High fever, persistent vomiting, or any unusual severe symptoms.

• This is not a complete list of side effects, and others may occur. Call your doctor for medical advice about side effects.

This vaccine is administered as an injection into the muscle (intramuscularly), usually in the deltoid muscle of the upper arm.

• It is given by a trained healthcare professional in a medical setting.

• The primary vaccination course typically consists of two doses given at a specific interval determined by local health guidelines.

• You will likely be asked to wait at the clinic for at least 15 to 30 minutes after receiving the injection to monitor for any immediate allergic reactions.

This vaccine works through a classic antigen exposure mechanism:

1. The chemically inactivated, non-replicating whole virus particles are injected into the muscle tissue.
2. Immune cells called antigen-presenting cells engulf the dead virus particles and display the viral proteins on their surface.
3. This triggers helper T cells and B cells to produce targeted antibodies and generate cellular immunity against multiple parts of the SARS-CoV-2 virus.

• You can take a mild over-the-counter pain reliever or fever reducer (like paracetamol/acetaminophen) if you develop injection site soreness, headache, or fever after the shot.

• Keep your physical or digital vaccination record in a safe place, as you may need it for travel or work requirements.

• It takes up to a few weeks after the completed vaccination series for your body to develop peak immunity.

This vaccine is stored in a standard refrigerator at 2°C to 8°C (36°F to 46°F) in professional medical facilities. Do not freeze.

• There are no known significant interactions between this vaccine and specific foods.

Tell your doctor about all your current medicines and any you start or stop using, especially:

• Immunosuppressive therapies (such as high-dose corticosteroids, chemotherapy, or radiation), which may diminish the immune response to the vaccine.

This vaccine should be used with caution, or avoided, if you have:

• A history of severe allergic reactions (anaphylaxis) to any previous dose of this vaccine or its excipients.

• Bleeding disorders or if you are on anticoagulant therapy (due to the risk of bleeding at the injection site).

• A high fever or acute infection on the day of vaccination (the dose should be postponed until you recover).

This product is not taken daily. It is administered as scheduled doses by a healthcare professional.

As this vaccine is administered by a healthcare professional in a controlled clinical setting, the chance of an overdose is extremely low.

If you miss a scheduled second dose or a recommended booster dose of this vaccine, contact your vaccination centre or healthcare provider immediately to reschedule. Completing the recommended series is necessary to ensure optimal immune protection.