The Truveta team at its Bellevue, Wash., headquarters last year. (Truveta Photo) Seattle-area health data company Truveta announced $320 million in fresh funding and an ambitious new initiative to create a giant genomic dataset. The new investment — which comes from 17 health systems, Illumina, and Regeneron — pushes Truveta’s valuation above $1 billion, making it the latest unicorn to emerge from the Seattle region. Founded in 2020, Truveta aims to aggregate medical records data from 30 partner...