a serious (often fatal) disease of the immune system transmitted through blood products especially by sexual contact or contaminated needles

a serious (often fatal) disease of the immune system transmitted through blood products especially by sexual contact or contaminated needles

a serious (often fatal) disease of the immune system transmitted through blood products especially by sexual contact or contaminated needles

a serious (often fatal) disease of the immune system transmitted through blood products especially by sexual contact or contaminated needles

an acquired response that is under the control of (conditional on the occurrence of) a stimulus

an acquired response that is under the control of (conditional on the occurrence of) a stimulus

an acquired response that is under the control of (conditional on the occurrence of) a stimulus

an acquired response that is under the control of (conditional on the occurrence of) a stimulus

a preference that is only acquired after considerable experience

a preference that is only acquired after considerable experience