Melissa is a 15-year-old high school student. Over the last week, she
had been feeling tired and found it difficult to stay awake in class.
By the time the weekend had arrived, she developed a sore throat that
made it difficult to eat and even drink. Melissa was too tired to get
out of bed, and she said her head ached. On Monday morning, her mother
took her to her doctor. Upon completing the physical exam, he told
Melissa the lymph nodes were enlarged in her neck and she had a fever.
He ordered blood tests and told Melissa he thought she had
mononucleosis, a viral infection requiring much bed rest.
- Innate and adaptive immune defenses work collectively in
destroying invasive microorganisms. What is the interaction between
macrophages and T lymphocytes during the presentation of antigen?
- Melissa’s illness is caused by a virus. Where are type I
interferons produced, and why are they important in combating viral
infections?
- Humoral immunity involves the activation of B lymphocytes and
production of antibodies. What are the general mechanisms of action that
make antibodies a key component of an immune response?
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