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, 2024 Lead Plaintiff Deadline: July 5, 2024 Investors 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 ac ...