BENSALEM, Pa., May 16, 2024 /PRNewswire/ -- Law Offices of Howard G. Smith announces that investors with substantial losses have opportunity to lead the securities fraud class action lawsuit against Altimmune, Inc. ("Altimmune" or the "Company") (NASDAQ: ALT).Class Period: December 1, 2023 – April 26, 2024Lead Plaintiff Deadline: July 5, 2024Investors suffering losses on their Altimmune investments are encouraged to contact the Law Offices of Howard G. Smith to discuss their legal rights in this class actio ...