Shares in Altimmune Inc. and Angion Biomedica Corp. were sharply down after the companies announced trial disappointments from a nasal COVID-19 vaccine and two investigational therapies. Altimmune was worst hit, with shares (NASDAQ:ALT) dropping 38% to $9.80 June 30 after announcing its nasal COVID-19 vaccine did not produce enough immune response and axing an immunotherapy trial after encountering problems finding enough subjects.