United States securities and exchange commission logo




                                                                                
                          May 16, 2024

       Stephen Uden, M.D.
       Chief Executive Officer
       Rallybio Corporation
       234 Church Street, Suite 1020
       New Haven, CT 06510

                                                        Re: Rallybio 
Corporation
                                                            Registration 
Statement on Form S-3
                                                            Filed May 10, 2024
                                                            File No. 333-279317

       Dear Stephen Uden:

              This is to advise you that we have not reviewed and will not 
review your registration
       statement.

               Please refer to Rules 460 and 461 regarding requests for 
acceleration. We remind you
       that the company and its management are responsible for the accuracy and 
adequacy of their
       disclosures, notwithstanding any review, comments, action or absence of 
action by the staff.

                                                        Please contact Alan 
Campbell at 202-551-4224 with any questions.



                                                                                
                          Sincerely,

                                                                                
                          Division of Corporation Finance
                                                                                
                          Office of Life Sciences
       cc:                                              Zachary Blume, Esq.