 LOS ANGELES--BUSINESS WIRE--- BLU CLASSACTION--Glancy Prongay Murray LLP GPM, a leading national shareholder rights law firm, announces that a class action lawsuit has been filed on behalf of investors who purchased or otherwise acquired BELLUS Health Inc. BELLUS or the Company NASDAQ: BLU securities between September 5, 2019 and July 5, 2020, inclusive the Class Period. BELLUS investors have until May 17, 2021 to file a lead plaintiff motion. If you suffered a loss on your BELLUS investme 