Karius is a biotechnology company that develops genomic sequencing tests for infectious diseases. The company's tests use next-generation sequencing technology to identify and quantify pathogens in a patient's blood, allowing for faster and more accurate diagnosis of infectious diseases. Karius' tests are used by healthcare providers to diagnose a range of infectious diseases, including sepsis, pneumonia, and meningitis. The company was founded in 2014 and is headquartered in South San Francisco, California.