https://techcrunch.com/2021/04/28/forerunners-eurie-kim-will-share-why-she-invested-in-oura-on-extra-crunch-live/ > When it comes to building a successful startup, biotech and hardware happen to be two of the most difficult verticals in the tech industry. But Oura is doing it anyway. > The health and fitness tracking ring has been used in a number of studies around COVID-19 and been worn by NBA and WNBA players to help prevent outbreaks in the league. Oura has raised nearly $50 million from investors including Lifeline Ventures, Bold Capital Partners and Forerunner.