Altimmune, Inc. is a clinical stage immunotherapeutic biotechnology company. It focuses on the discovery and development of products to stimulate robust and durable immune responses for the prevention and treatment of diseases. The company's portfolio includes RespirVec and Densigen that targets to stimulate the elements of the human immune system to treat respiratory diseases, chronic infections, and cancer. Altimmune was founded in 1997 and is headquartered in Gaithersburg, MD.