AdvertisementLong COVID scientists try to unravel blood clot mystery13:22Download AudioResumeMay 15, 2023Rebecca RamirezEmily KwongGabriel SpitzerMargaret CirinoBerly McCoyfacebookEmailAs part of studying long COVID, graduate researcher Bradley Wade Hamilton separates out microclots from blood platelets in a solution. (Anil Oza/NPR)