Natera Inc. added its Prospera assessment for lung transplant patients to its portfolio, joining the company’s tests for rejection of kidney and heart transplants. The test uses donor-derived cell-free DNA (dd-cfDNA) to detect acute rejection as well as chronic rejection and infection in stable patients. Results of the VALID study presented at CHEST 2021 demonstrated that the Prospera Lung test had a negative predictive value of 97.33%, sensitivity of 89.06% and area under the curve of 0.91.