Question

Killed or inactivated vaccines are prepared by :

A- passage of the pathogen through unnatural hosts or tissue culture.
B- All of the choices are correct.
C- removal of virulence genes from the microbe.
D- long-term subculturing of the microbe.
E- treatment with formalin, heat, or radiation.

Answer 1

Inactivated vaccines are prepared by treating the microbe with formalin, heat, or radiation, rendering it unable to cause the disease it normally would. These vaccines stimulate an immune response in the body and help the immune system recognize and remember the pathogen.

Step-by-step explanation:

Inactivated vaccines, also known as killed vaccines, are prepared by treating the microbe with formalin, heat, or radiation. This process kills or inactivates the virus or bacteria, making it incapable of causing the disease it normally would.

For example, the influenza vaccine is prepared using inactivated or killed virus particles. These particles cannot replicate or cause disease, but they can still stimulate an immune response in the body.

The inactivated vaccines work by introducing the killed or inactivated pathogen into the body, allowing the immune system to recognize and remember it. This helps the immune system respond more effectively if the person is exposed to the live, virulent pathogen in the future.