Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Registration Statement No. 333-283678 on Form S-4 of our report dated December 6, 2024, relating to the financial statements of Kalaris Therapeutics, Inc. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/Deloitte & Touche LLP

San Francisco, California

January 17, 2025