Coley Pharmaceutical Group operates as a biopharmaceutical company developing therapeutics and drug candidates that direct the human immune system to fight cancers, asthma and allergy, autoimmune disorders, and to enhance the effectiveness of vaccines. The company was formerly known as CpG ImmunoPharmaceuticals, Inc. and in August 2000 it changed its name to Coley Pharmaceutical Group, Inc. The company was founded in 1997 and is based in Wellesley, Massachusetts. As of December 28, 2007, Coley Pharmaceutical Group, Inc. operates as a subsidiary of Pfizer Inc.