Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

Checkpoint Therapeutics, Inc.

New York, NY

We hereby consent to the use in the Prospectus constituting a part of this Registration Statement of our report dated March 17, 2017, relating to the financial statements of Checkpoint Therapeutics, Inc., which is contained in that Prospectus.

We also consent to the reference to us under the caption “Experts” in the Prospectus.

/s/BDO USA, LLP

New York, NY

March 21, 2017 

BDO USA, LLP, a Delaware limited liability partnership, is the U.S. member of BDO International Limited, a UK company limited by guarantee, and forms part of the international BDO network of independent member firms.

BDO is the brand name for the BDO network and for each of the BDO Member Firms.