 SAN DIEGO, Oct. 10, 2021 PRNewswire -- Robbins Geller Rudman Dowd LLP announces that purchasers of Sesen Bio, Inc. NASDAQ: SESN securities between December 21, 2020 and August 17, 2021, both dates inclusive the Class Period, have until October 18, 2021 to seek appointment as lead plaintiff in Bibb v. Sesen Bio, Inc., No. 