Exhibit 99.1 This statement on Form 4 is filed jointly by BCLS Acquisition Holdings, LP and BCLS Acquisition Holdings (GP), LLC. The principal business address of each of these reporting persons is 200 Clarendon Street, Boston, Massachusetts 02116. Name of Designated Filer: BCLS Acquisition Holdings, LP Date of Event Requiring Statement: October 26, 2020 Issuer Name and Ticker or Trading Symbol: BCLS Acquisition Corp. (Nasdaq: BLSA) BCLS Acquisition Holdings, LP By: BCLS Acquisition Holdings (GP), LLC, its general partner By: /s/ Jeffrey Schwartz ------------------------------ Name: Jeffrey Schwartz Title: Manager BCLS Acquisition Holdings (GP), LLC By:/s/ Jeffrey Schwartz ------------------------------ Name: Jeffrey Schwartz Title: Manager
