Perceptive Advisors SC 13D Landos Biopharma / PERCEPTIVE ADVISORS ownership change

Exhibit 1

JOINT FILING AGREEMENT

The persons below hereby agree that the Schedule 13D to which this agreement is attached as an exhibit, as well as all future amendments to such Schedule 13D, shall be filed jointly on behalf of each of them. This agreement is intended to satisfy the requirements of Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934.

Dated: February 18, 2021

PERCEPTIVE ADVISORS LLC
By:	/s/ Joseph Edelman
	Name: Joseph Edelman
	Title:   Managing Member

/s/ Joseph Edelman

JOSEPH EDELMAN

PERCEPTIVE LIFE SCIENCES MASTER FUND, LTD.
By:	Perceptive Advisors LLC
By:	/s/ Joseph Edelman
	Name: Joseph Edelman
	Title:   Managing Member

PERCEPTIVE XONTOGENY VENTURE FUND, L.P.
By:	Perceptive Xontogeny Ventures GP, LLC
By:	/s/ Joseph Edelman
	Name: Joseph Edelman
	Title:   Managing Member

XONTOGENY, LLC
By:	C2 Ventures, LLC
By:	/s/ Joseph Edelman
	Name: Joseph Edelman
	Title:   Managing Member

PX Venture (A), LLC
By:	Perceptive Venture Advisors, L.P.
By:	Perceptive Xontogeny Venture GP, LLC
By:	/s/ Joseph Edelman
	Name: Joseph Edelman
	Title:   Managing Member