antigenic variation

Question 1

antigenic variability

Answer 1

pathogens dna can mutate frequently if a mutation occurs in a gene which codes for that antigen then the shape of the antigen will change

Question 2

immunity with antigenic variability

Answer 2

any of the previous immunity to this pathogen is n longer effective as all the memory cells in the blood will have memory of the old antigen shape

Question 3

antigenic variability and the flu vaccine

Answer 3

the influenzas virus mutates and changes its antigens very quickly and this is why there is a new flu vaccine every yera