\nThe adaptive immune system is the workhorse of current vaccines. It produces specialized agents, like antibodies and T cells, that target specific pathogens and remember them for years to come. The innate immune system, which deploys within minutes of a new infection, has received less attention because it typically lasts only a few days before ceding the spotlight to the adaptive immune system. It was seen as the warm-up act for the main show.
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book from ancient China.