Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the reference to our firm under the caption "Experts" in the Registration Statement (Form S-3) and related Prospectus of Idera Pharmaceuticals, Inc. for the registration of 4,120,878 shares of its common stock and to the incorporation by reference therein of our report dated March 1, 2021, with respect to the financial statements of Idera Pharmaceuticals, Inc., included in its Annual Report (Form 10-K) for the year ended December 31, 2020, filed with the Securities and Exchange Commission.
| /s/ ERNST & YOUNG LLP | |
| Philadelphia, Pennsylvania | |
| March 2, 2021 |
