Question

A vaccine is usually given:

• A. At the time disease causing germs enters the body
• B. Any time
• C. To foetus
• D. Before the disease appear

Answer 1

Answer: (D)

• A vaccine is a biological preparation that provides acquired immunity to a particular disease.
• Vaccines are made from microbes. The antigen in the vaccine is the same as the antigen on the surface of the disease-causing microbe.
• The vaccine stimulates the body to produce antibodies against the antigen in the vaccine.
• The antibodies created will be the same as those produced if the person was exposed to the pathogen.
• When the vaccinated person comes into contact with the disease-causing microbe, the antibodies recognize the pathogen and act against it. Hence, the vaccine should be given before attacking the disease.

So, the correct answer is option C.