It is not the first time they announce that the entire human genome has been decoded, but this time it is definitive. For the first time in 2000, they announced the decoding of the genome. However, the decoding was quite superficial and since then it has been worked more deeply on the chromosome chromosome. The remaining 23 chromosomes were decoded and have now finished with chromosome 1, the largest, so they have ensured that the entire human genome is decoded.