• Shashank Raj

Inside-Out of Indian Covid-19 Vaccines Explained

Updated: Jan 29

Disclaimer (1): This blog post does not intend to make any claims about a particular vaccine and only displays data and facts available through factsheet of the respective vaccines sourced from the vaccine manufacturers' website.

So, you might have seen similar pictures as above here and there and also heard about the two famous names Covaxin and Covishield, so these two particular vaccines were granted approval for restricted use in Emergency situation by Central Drug Standard Organization. So before reading this article, I would recommend you to read another interesting article by me How specifically soaps work to eliminate Covid-19 ? if you haven't read it yet.


I will present you facts one by one for both the vaccines so lets start with,


  1. Covaxin

Covaxin is developed by Hyderabad (India) based Bharat Biotech and the facts of this vaccine are as follows,


a. Type: Inactivated

b. Administration Method: Intramuscular Injection (in Deltoid Muscle)

c. Ingredients: 6µg of whole-virion inactivated SARS-CoV-2 antigen (Strain: NIV-2020-770), and the other inactive ingredients such as aluminum hydroxide gel (250 µg), TLR 7/8 agonist (imidazoquinolinone) 15 µg, TM 2-phenoxyethanol 2.5 mg, and phosphate buffer saline up to 0.5 ml. The vaccine (COVAXIN ) thus has been developed by using inactivated/killed virus along with the aforementioned chemicals.

d. Dosage: Preferably 2 doses to be given 4 weeks apart.

e. Side-Effects reported:

  • Injection site pain

  • Injection site swelling

  • Injection site redness

  • Injection site itching

  • Stiffness in the upper arm

  • Weakness in injection arm

  • Body ache

  • Headache

  • Fever

  • Malaise

  • Weakness

  • Rashes

  • Nausea

  • Vomiting

Disclaimer (2): The above mentioned information has been extracted from the factsheet available on the vaccine manufacturer website and this blog has tried to avoid moderation and tried to present the said facts as original. Blog readers wishing to verify the content can access the factsheet using this link. (Current factsheet as on 28 January 2021)



2. Covishield

This vaccine is developed by The University of Oxford, AstraZeneca and is being manufactured by Serum Institute of India (World's largest Vaccine Maker) and the facts of the vaccine are as follows,


a. Type: Non-Replicating Viral Vector

b. Administration Method: Intramuscular Injection (in Deltoid Muscle)

c. Ingredients: L-Histidine, L-Histidine hydrochloride monohydrate, Magnesium chloride hexahydrate, Polysorbate 80, Ethanol, Sucrose, Sodium chloride, Disodium edetate dihydrate (EDTA), Water for injection.

d. Dosage: Preferably 2 doses to be given 4 to 6 weeks apart.

e. Side-Effects reported:


Very Common (may affect more than 1 in 10 people)

  • tenderness, pain, warmth, redness, itching, swelling or bruising where the injection is given

  • generally feeling unwell

  • feeling tired (fatigue)

  • chills or feeling feverish

  • headache

  • feeling sick (nausea)

  • joint pain or muscle act

Common (may affect up to 1 in 10 people)

  • a lump at the injection site

  • fever

  • being sick (vomiting)

  • flu like symptoms, such as high temperature, sore throat, runny nose, cough and chills

Uncommon (may affect up to 1 in 100 people)

  • feeling dizzy

  • decreased appetite

  • abdominal pain

  • enlarged lymph nodes

  • excessive sweating, itchy skin or rash

Disclaimer (3): The above mentioned information has been extracted from the factsheet available on the vaccine manufacturer website and this blog has tried to avoid moderation and tried to present the said facts as original. Blog readers wishing to verify the content can access the factsheet using this link. (Current factsheet as on 28 January 2021)


Also readers are advised to check the most updated factsheet time to time if they wish to obtain any information regarding respective vaccine, since more the data available more accurate is the factsheet available so please see the updated factsheets on the official websites of the respective vaccines time to time.


Till the time of writing the blog, 23.5 Lakh people were combined beneficiaries of the above vaccines.


Another important thing to note in this regard is that approval conditions for both the vaccine are different, like the approval of Covaxin is different from Covishield. See and verify it in below mentioned tweet.



So that's all for today guys I hope you got something new to learn, and this blog was exclusively written upon the request of many blog readers. So continue reading, keep learning and stay tuned.


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