EX-A

Exhibit A

JOINT FILING AGREEMENT

PURSUANT TO RULE 13D-1(K)(1)

The undersigned acknowledge and agree that the Statement on Schedule 13D filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the shares of Common Stock, par value $0.0001 per share, of Science 37 Holdings, Inc. is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D shall be filed on behalf of each of the undersigned that is named as a reporting person in such filing without the necessity of filing an additional joint filing agreement. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that it knows or has reason to believe that such information is inaccurate. This joint filing agreement may be executed in any number of counterparts and all of such counterparts taken together shall constitute one and the same instrument.

Dated: October 18, 2021


PPD, INC.

By:		/s/ Julia James
Name:		Julia James
Title:		EVP, General Counsel and Secretary

EAGLE HOLDING COMPANY II, LLC

By:		/s/ B. Judd Hartman
Name:		B. Judd Hartman
Title:		General Counsel and Secretary

JAGUAR HOLDING COMPANY I, LLC

By: Eagle Holding Company II, LLC, its Managing Member

By:		/s/ B. Judd Hartman
Name:		B. Judd Hartman
Title:		General Counsel and Secretary

JAGUAR HOLDING COMPANY II

By:		/s/ Julia James
Name:		Julia James
Title:		General Counsel and Secretary


WILDCAT ACQUISITION HOLDINGS (UK) LIMITED

By:		/s/ B. Judd Hartman
Name:		B. Judd Hartman
Title:		Director

PHARMACEUTICAL PRODUCT DEVELOPMENT, LLC

By:		/s/ Julia James
Name:		Julia James
Title:		EVP, General Counsel and Secretary