then X= ....... 
#Question id: 2015
#Section 2: General Biology
Some viruses can undergo latency, the ability to remain inactive for some period of time. Which of the following is an example?
#Question id: 2016
#Section 2: General Biology
Most newly emerging diseases, no matter how severe their effects on a population, human or otherwise, have which of the following in common?
#Question id: 2017
#Section 2: General Biology
Which of the following could prevent the appearance of the symptoms of an allergy attack?
#Question id: 2018
#Section 2: General Biology
What aspect of the immune response would a patient who has a parasitic worm infection and another patient responding to an allergen such as ragweed pollen have in common?
#Question id: 2019
#Section 2: General Biology
Which of the following is not a component of an insectʹs defense against infection?
#Question id: 2020
#Section 2: General Biology
Which statement best describes the difference in responses of effector B cells (plasma cells) and cytotoxic T cells?