IMMUNOLOGY

Detailed explanation-1: -A vaccine is a preparation that contains weakened or killed pathogens. It cannot cause a full-fledged infection but it can activate the immune system. The immune system prepares weapons against this pathogen and keeps them handy if at all the same pathogen attacks the body again. This is the basis of immunisation.

Detailed explanation-2: -Live-attenuated vaccines Live vaccines use a weakened (or attenuated) form of the germ that causes a disease. Because these vaccines are so similar to the natural infection that they help prevent, they create a strong and long-lasting immune response.

Detailed explanation-3: -Live virus vaccines use the weakened (attenuated) form of the virus. The measles, mumps, and rubella (MMR) vaccine and the varicella (chickenpox) vaccine are examples. Killed (inactivated) vaccines are made from a protein or other small pieces taken from a virus or bacteria.

Detailed explanation-4: -Vaccines are products that produce immunity to a specific disease. When you are immune to a disease, it means you are protected against that disease (you can be exposed to it without becoming sick). Most vaccines are given by injection (needle), but some are given orally (by mouth) or nasally (sprayed into the nose).

Detailed explanation-5: -Virulence reduction Was this answer helpful?

Detailed explanation-6: -Vaccine: A preparation that is used to stimulate the body’s immune response against diseases. Vaccines are usually administered through needle injections, but some can be administered by mouth or sprayed into the nose.