
Moderna shares jumped about 14% after investors reacted to early-stage work on a hantavirus vaccine, reflecting renewed enthusiasm for mRNA applications. But the initial rally largely faded midday as health officials downplayed the likelihood of a broader pandemic and peers such as Inovio and Novavax pared gains. Investors should still weigh the preliminary nature of the hantavirus program, regulatory uncertainty, and the company’s recent large patent-settlement costs when assessing risk.
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