Question

Annual flu shots work by:

Question 1 options:

increasing the volume of lymph,


increasing the number of white cells,


increasing the number of specific antibodies,


introducing a relatively innocuous virus to fight off a more dangerous virus.

Answer 1

Answer is introducing a relatively innocuous virus to fight off a more dangerous virus. Flu shot is a vaccine, during which inactivated virus is injected into the human organism to allow for the formation of immunity against the disease.