US Stocks: ImmunityBio shares drop 20% on FDA warning letter over cancer therapy claims in ad by ET Markets | March 24, 2026 9:05 pm | Indian Stocks, Market, News Shares of ImmunityBio fell 20% on Tuesday after the U.S. Food and Drug Administration issued a warning letter that said a television advertisement and podcast promoting its cancer therapy were false or misleading and violated federal law.
