With reference to recent developments regarding 'Recombinant Vector Vaccines', consider the following statements :
- 1.Genetic engineering is applied in the development of these vaccines.
- 2.Bacteria and viruses are used as vectors.
Which of the statements given above is/are correct?
Show answer
Answer: C. Statement 1 is correct: recombinant vector vaccines are made by genetic engineering, inserting a gene from the pathogen into a harmless carrier. Statement 2 is correct: both weakened viruses (like adenoviruses in some COVID-19 vaccines) and bacteria can serve as vectors. So both.
Watch for: Students remember only viral vectors from COVID vaccines and forget bacterial vectors.
Why the other options are wrong
- A. Wrong because statement 2 is also correct.
- B. Wrong because statement 1 is also correct.
- D. Wrong because both statements are correct.
Source to check: US NIH / NIAID 'Vaccine Types' page; WHO COVID-19 vaccine explainer (2021)
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.