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15. during a secondary immune response, high-affinity igg antibodies are produced. which of the following best explains why low-affinity igm antibodies are not made? a. naive pathogen-specific b cells are suppressed by negative signaling through fcγriib1. b. naive pathogen-specific b cells isotype switch and hypermutate much more quickly during secondary immune responses. c. memory b cells outnumber naive b cells. d. low-affinity igm antibodies are made only when antigen concentration is exceedingly high.

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15. during a secondary immune response, high-affinity igg antibodies are produced. which of the foll...
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