Civil Services UPSC CAPF (Assistant Commandants) Test Series 2025 General Science Biology Scientific Developments
How do COVID vaccines stimulate an immune response?
1
By introducing live attenuated SARS-CoV-2 virus
2
By introducing a 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