Depression, Schizophrenia and Bipolar Disorder Are Linked with Ancient Viral DNA in Our Genome
Retroviruses, some of which predate the human species, are tied to a genetic susceptibility to major psychiatric disorders
![Depression, Schizophrenia and Bipolar Disorder Are Linked with Ancient Viral DNA in Our Genome](https://static.scientificamerican.com/dam/m/3ea3b14a92ca1ea/original/GettyImages-1137398083WEB.jpg?w=1200)
Retroviruses, some of which predate the human species, are tied to a genetic susceptibility to major psychiatric disorders
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