What is the definition of Immunogenesis Definition?

Immunogenesis, my friend, is the fancy term for the body's immune system's "first taste test" against invaders. Imagine if your immune system was a high-end chef, trying out new dishes from foreign lands before serving them to you. So, when it identifies a germ for the first time, it's basically saying, "Hey, are you really ready to get sick? Let me show you how this stuff tastes!"

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Here's an edgy sentence for you: "Last week, my immunogenesis test revealed that the flu vaccine was more like a bad taco seasoning than a shield against the virus."