PATHOLOGY MCQ
IMMUNE RESPONSE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Live viruses or bacteria
|
|
|
Protein fragments from the virus or bacteria
|
|
|
A dead or weakened form of the virus or bacterium
|
|
|
Bacteriophages with DNA or RNA from the virus or bacteria
|
Detailed explanation-1: -Vaccines contain killed, weakened, or synthetically manufactured versions of the disease-causing germ or parts of the germ called antigens. Some newer vaccines (e.g., COVID-19 mRNA vaccines) contain instructions for producing antigens rather than the antigen itself.
Detailed explanation-2: -Vaccines contain antigens that stimulate the immune system to produce an immune response that is often similar to that produced by the natural infection.
Detailed explanation-3: -While most vaccines work by inducing B lymphocytes to produce antibodies (see below), activation of T-cells-another type of immune system cell that helps protect against disease-is also important for some vaccines.
Detailed explanation-4: -For example, in response to an infection or vaccination with a live virus, IgM antibodies usually are made first, followed by IgG and some other types of antibodies. For the most part, the antibodies that you form from getting vaccinated are the same kind of antibodies you would get from a natural infection.