Po-Shen Loh is a social entrepreneur, working across the spectrum of mathematics, education, and healthcare, all around the world. He is the founder of the free personalized learning platform expii.com, a social enterprise supported by his series of online math courses that reinvent the middle school math curriculum with a focus on creative thinking. He is also a math professor at Carnegie Mellon University and the national coach of the USA International Mathematical Olympiad team. Upon the outbreak of COVID, he turned his mathematical attention to create NOVID, the world's first app to introduce the fundamentally different network radar paradigm for pandemic control.