Regarding immune memory, which of the following is CORRECT:  a. immune memory only occurs after vaccination  b. immune memory only protects against viral infection  c. immune memory provides and faster and more potent response  d. immune memory is due to memory macrophages being formed after first exposure to an  antigen  e. without B cells, immune memory doesn’t happen

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A: Hi! Since you posted multiple questions, we will be answering the first few for you. If you want the…