NextMockपरीक्षा शोधा, उदा. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2023

BPSC – Combined Competitive Examination · प्रश्न 18

How do COVID vaccines stimulate an immune response?

  1. By introducing live attenuated SARS-CoV-2 virus
  2. By introducing real SARS-CoV-2 virus
  3. By introducing a harmless piece of SARS-CoV-2 virus
  4. By introducing antibodies against SARS-CoV-2 virus
उत्तर दाखवा आणि स्पष्टीकरण

उत्तर: (C) By introducing a harmless piece of SARS-CoV-2 virus

स्पष्टीकरण

Vaccines (mRNA, vector, protein, inactivated) expose the body to harmless viral parts so it makes its own antibodies.

  • (A) चूक

    Wrong: most approved COVID vaccines are not live-attenuated.

  • (B) चूक

    Wrong: unsafe; not how vaccines work.

  • (C) बरोबर

    Correct: they present a harmless antigen (e.g. spike protein or its code) to train immunity.

  • (D) चूक

    Wrong: that is passive immunisation, not vaccination.