Medivo, a New York-based online health monitoring platform, has raised $15 million in Series B financing led by the Merck Global Health Innovation Fund, with participation from existing investors Safeguard Scientifics and MentorTech Ventures. To date, the company has raised more than $22 million.

Cambridge, Mass.-based Daktari Diagnostics Inc. has raised $10 million in a staged financing round, the company announced recently. The financing for Daktari—which makes point-of-care diagnostic systems for the developing world—was led by Merck Global Health Innovation Fund. Norwich Ventures and the Partners Innovation Fund also contributed. The money will help complete development and bring to market the company’s initial products, intended for use in monitoring HIV patients worldwide.

Irvine, Calif.-based biotech company Aviir Inc. announced Tuesday that it had sealed an agreement with investors to raise up to $30 million. The financing includes an initial investment of $10 million and future investments of up to $20 million upon achieving certain milestones. Merck Global Health Innovation Fund led the round. Current investors Bay City Capital, Aberdare Ventures, and New Leaf Venture Partners also participated.