Moderna Stock Jumps. U.S. Passenger on Hantavirus Cruise Ship Tests Positive. -- Barrons.com

Dow Jones05-11

By Callum Keown

Moderna stock jumped 8% in premarket trading Monday after a U.S. national tested positive for the Andes strain of hantavirus.

The U.S. health department said one passenger on a repatriation flight has tested mildly positive for the virus, while another is currently experiencing mild symptoms. The Department of Health and Human Services (HSS) said all 17 American citizens from the MV Hondius cruise ship are currently en route to the U.S.

The two passengers are traveling in the plane's biocontainment units "out of an abundance of caution," HHS said in a statement.

Moderna shares, which jumped 12% on Friday, were up 7.8% at $58.60 ahead of the open Monday.

The company confirmed it was exploring a hantavirus treatment in a statement Thursday, describing its efforts as "early-stage and ongoing" and as part of a broader push to address emerging infectious diseases.

Write to Callum Keown at callum.keown@dowjones.com

This content was created by Barron's, which is operated by Dow Jones & Co. Barron's is published independently from Dow Jones Newswires and The Wall Street Journal.

(END) Dow Jones Newswires

May 11, 2026 05:29 ET (09:29 GMT)

Copyright (c) 2026 Dow Jones & Company, Inc.

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