San Diego-based Exagen Diagnostics Inc. has a somewhat unique business model. It's aiming to both improve diagnostics and monitoring for autoimmune patients, but also to partner with biopharmas to promote better testing – and even to market related therapeutics to autoimmune specialists.

Baxter International Inc. has struck a definitive agreement to acquire Cheetah Medical Inc., a provider of noninvasive hemodynamic monitoring technologies. The Deerfield, Ill.-based company agreed to pay $190 million up front in cash, with the potential for an additional $40 million based on clinical and commercial milestones.

Getting on top of the persistent HIV epidemic requires getting ahead of new cases, but only about 7% of at-risk patients have been advised of a prophylactic drug regime approved by the FDA seven years ago. Two new studies appearing in The Lancet HIV suggest that an algorithm that uses electronic health record (EHR) data can help physicians identify their at-risk patients who are good candidates for pre-exposure prophylaxis (PrEP), thus improving the odds that modern medicine might finally put an end to the scourge of acquired immunodeficiency syndrome.

Monitoring the electrical activity within and between cells on a large scale in a living animal may seem like a task that's next to impossible. But that's precisely what researchers at Cambridge, Mass.-based Harvard University aim to do with the next iteration of nanoscale sensors in the shape of wires.