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What common features are involved in adenovirus 12 infection and bare-lymphocyte syndrome?

I have this homework assignment and I can't figure out the answer to 2 of the questions. I've read all the chapters and still am lost. Could someone please guide me or give me an idea of what the answer is? 1. Describe the elements of humoral and cellular immunity that are involved in immune responses to viral infections. 2. What mechanisms have infectious agents evolved to defeat these elements? Thank you in advance, May

I have this homework assignment and I can't figure out the answer to 2 of the questions. I've read all the chapters and still am lost. Could someone please guide me or give me an idea of what the answer is? 1. A mouse is immunized with bovine serum albumin. Describe what happens in peripheral lymph nodes after a first and second injection of antigen. 2. What are the steps involved in forming an Ig gene that will encode a complete immunoglobulin molecule? Thanks in advance- May