vaccination

Question 1

describe the process of vaccination

Answer 1

1. the vaccination injects a small amount of dead or inactive forms of the pathogen into the body
2. stimulates white blood cells as they recognise foreign antigens so produce antibodies
3. if it re-enters memory cells produce the antibodies rapidly, preventing illness and making you immune

Question 2

what is herd immunity?

Answer 2

when a high proportion of the population are vaccinated (immune) to a disease so the spread of it will be limited

Question 3

advantages of vaccination

Answer 3

-eradicated many diseases and reduced occurrence of many
-prevent epidemics due to herd immunity as it is unlikely to catch it if most people are immune

Question 4

disadvantages of vaccination

Answer 4

-vaccines aren’t always effective
-side effects may occur

Question 5

what is a vaccination?

Answer 5

the process of introducing small quantities of dead or inactive forms of a pathogen into the body to stimulate the white blood cells to produce antibodies