Greg Brockman says 300 million people come to ChatGPT with health questions every week, and reveals OpenAI is building a bottoms-up clinicians product, top-down enterprise product for hospitals, and a three-sided marketplace in health "It's actually very surprising to me how little airtime what we're doing in health gets relative to how many people it's actually helping." "We have like 300 million people each week coming to ChatGPT for health queries. 300 million people, that's a huge number." "Then we're also building a bottoms-up clinicians product, and we're building a top-down enterprise product for hospitals." "So we have this three-sided marketplace in health, and what we're going to be able to do there is things like, you want to find people for clinical trial enrollment, that's a hard problem, but we actually may have the ability to help find people that would otherwise not be found." "That both helps the patient and helps these drugs be able to move faster."