genetic – adj. of, relating to, or involving genes
neutralize – v. to stop (someone or something) from being effective or harmful
immune system – n. the system that protects your body from diseases and infections
primate – n. any member of the group of animals that includes human beings, apes, and monkeys
dose – n. the amount of a medicine, drug, or vitamin that is taken at one time
expose – v. subject to risk from a harmful action or condition
mutate – v. biology to cause a gene to change and create an unusual characteristic in a plant or animal
antiretroviral – adj. acting, used, or effective against retroviruses <antiretroviral drugs> <antiretroviral therapy>