CAMBRIDGE, Mass.--(BUSINESS WIRE)--Idera Pharmaceuticals, Inc. (NASDAQ: IDRA) today announced that Merck, known as MSD outside the United States and Canada, has selected several novel Toll-like Receptor (TLR) agonists targeted to TLR7, TLR8 or TLR9 for evaluation and use as vaccine adjuvant candidates under the companies’ collaboration and license agreement.