Valuations in the med-tech space lately call into question the old medical adage: “If you hear hoofbeats, think horses.” These days, you would be wise to consider unicorns in the differential diagnosis. Two new companies achieved the formerly rare status just this week. Viz.ai Inc.’s closing today of a $100 million series D financing propelled it into the stratosphere with a $1.2 billion valuation, joining Bostongene LLC which completed its own $150 million round Wednesday.

Neuro-Bio Ltd. has published animal data it says confirms its hypothesis about an underlying cause of Alzheimer's and showing its lead molecule NBP-14 decreases levels of brain amyloid and restores memory in a mouse model of the disease.

Elekta AB signed a commercial agreement with GE Healthcare Co. Ltd. to expand hospital access to radiotherapy. Marlborough, Mass.-based GE Healthcare said it will combine its precision imaging solutions with Elekta’s radiation therapy portfolio to provide hospitals worldwide with a more comprehensive oncology offering.