Fighting disease - vaccination

Question 1

how do vaccinations protect us from future injections

Answer 1

when infected white blood cells learn how to fight it - but by then you can be quite ill
vaccinations put dead or inactive pathogens into the body so the white blood cells can learn how to fight it

Question 2

list the pros of vaccination

Answer 2

control communicable disease

epidemics can be prevented

Question 3

list the cons of vaccination

Answer 3

don’t always work

bad reactions