#Question id: 1871
#Section 2: General Biology
Deletions in the T-cell CD154 (CD40L) gene produce:
#Question id: 1872
#Section 2: General Biology
Which of the following have NOT provided examples of secondary immunodeficiency?
#Question id: 1873
#Section 2: General Biology
Mutations in the gene encoding which of the following most commonly results in severe combined immunodeficiency (SCID)?
#Question id: 1874
#Section 2: General Biology
Which of the following is the single immunodeficiency disease that most profoundly affects CD4-positive T-cells?
#Question id: 1875
#Section 2: General Biology
What is the best description of an antibody that would prevent infection with HIV?
#Question id: 1876
#Section 2: General Biology
What is the only HIV vaccine employed to have provided any evidence of efficacy?