Only the carriers, and they are a small minority for a very long time. Ra said "trickle by trickle, there will be this new mutated form that slowly comes in to the planet". Most children born after the change are still human, living designs we already recognize, with small differences. He put it plainly that there will always be more humans than Raves. Nobody alive now carries it. So the mutation is not something that sweeps through a population on a date. It is a slow biological thread inside a species that otherwise continues.
This is not a fact, not medical advice and not a promise of healing. It is part of the cosmology Ra Uru Hu, who founded Human Design, left behind, and nobody knows exactly how it will unfold.
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