CUSIP No. 299734103

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: July 1, 2020

FLAGSHIP VENTURELABS IV LLC
By: Flagship Ventures Fund IV, L.P.
By: Flagship Ventures Fund IV General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

FLAGSHIP VENTURES FUND IV, L.P.
By: Flagship Ventures Fund IV General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

FLAGSHIP VENTURES FUND IV-RX, L.P.
By: Flagship Ventures Fund IV General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

FLAGSHIP VENTURES FUND IV GENERAL PARTNER LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

FLAGSHIP VENTURELABS V LLC
By:	Flagship VentureLabs V Manager LLC
By:	Flagship Pioneering, Inc.

CUSIP No. 299734103

By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Director

FLAGSHIP VENTURELABS V MANAGER LLC
By:	Flagship Pioneering, Inc.
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Director

FLAGSHIP PIONEERING, INC.
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Director

FLAGSHIP VENTURES FUND V, L.P.
By:	Flagship Ventures Fund V General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

FLAGSHIP V VENTURLABs RX FUND, L.P.
By:	Flagship Ventures Fund V General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

NUTRITIONAL HEALTH SIDE FUND, L.P.
By:	Flagship Ventures Fund V General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

NUTRITIONAL HEALTH DISRUPTIVE INNOVATION FUND, L.P.

CUSIP No. 299734103

By:	Flagship Ventures Fund V General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

FLAGSHIP VENTURES FUND V GENERAL PARTNER LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

FLAGSHIP VENTURES OPPORTUNITIES FUND I, L.P.
By:	Flagship Ventures Opportunities Fund I General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

FLAGSHIP VENTURES OPPORTUNITIES FUND I GENERAL PARTNER LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

NUTRITIONAL HEALTH LTP FUND, L.P.
By:	Nutritional Health LTP Fund General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

NUTRITIONAL HEALTH LTP FUND GENERAL PARTNER LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

/s/ Noubar B. Afeyan, Ph.D.

NOUBAR B. AFEYAN, PH.D.