Altimmune Inc. $(ALT)$ shares dropped in the extended session Tuesday after the biotech said it was discontinuing study of a COVID-19 nasal spray vaccine because it didn't work as well as anticipated.
Altimmune Inc. $(ALT)$ shares dropped in the extended session Tuesday after the biotech said it was discontinuing study of a COVID-19 nasal spray vaccine because it didn't work as well as anticipated.
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