NEW YORK, June 28, 2024 /PRNewswire/ -- The Gross Law Firm issues the following notice to shareholders of Altimmune, Inc. (NASDAQ: ALT).Shareholders who purchased shares of ALT during the class period listed are encouraged to contact the firm regarding possible lead plaintiff appointment. Appointment as lead plaintiff is not required to partake in any recovery.CONTACT US HERE:https://securitiesclasslaw.com/securities/altimmune-inc-loss-submission-form/?id=87822&from=4CLASS PERIOD: December 1, 2023 to April ...