THE COMPOSITION OF BLOOD;VACCINES(3)

Question 1

What are vaccines?

Answer 1

Artificial immunity against a disease without contracting the disease

Question 2

How do vaccinations work?

Answer 2

1. Harmless (dead or altered) form of the pathogen , injected into the body
2. Pathogens are weakened=cannot cause illness but provoke an immune response
3. Lymphocytes produce specific antibodies that target and attach onto the antigen to make memory cells
4. The memory cells=remains in the blood=will quickly respond to the antigen if encountered again in an infection
5. As memory cells have been produced this immunity is long lasting

Question 3

Give 1 example of a type of vaccination

Answer 3

A WEAKENED STRAIN of the actual microbe e.g (vaccines against polio)

Question 4

Give a 2nd example of a type of vaccination

Answer 4

dead microbes=typhoid

Question 5

Give 3rd example of a type of vaccination

Answer 5

Just the antigens themselves=influenza vaccines