Correct option is B
Explanation-
India's first indigenous COVID-19 vaccine is Covaxin, developed by Bharat Biotech in collaboration with the Indian Council of Medical Research (ICMR). Covaxin is a whole virion inactivated vaccine, meaning - It contains SARS-CoV-2 viruses that have been killed (inactivated), so they cannot replicate or cause disease, but still elicit an immune response. It uses a well-established platform used in many traditional vaccines.
Incorrect Options -
Option a - mRNA vaccine – This applies to vaccines like Pfizer-BioNTech and Moderna, not Covaxin.
Option c - Attenuated virus – Involves a live but weakened virus, which Covaxin is not. India hasn’t used attenuated COVID vaccines widely.
Option d - Recombinant adenovirus vector vaccine – This refers to Covishield (Oxford-AstraZeneca vaccine), which is not indigenous (though manufactured in India by Serum Institute).
Correct Option: Option b - It is a preparation of inactivated whole virus
