Third MERS Virus Infection Confirmed in US

Particles of the Middle East respiratory syndrome (MERS) coronavirus that emerged in 2012 are seen in an undated colorized transmission electron micrograph from the National Institute for Allergy and Infectious Diseases (NIAID). An Illinois resident tested positive for Middle East Respiratory Syndrome after being in contact with an infected patient, though he did not show signs of illness, U.S. health officials said on Saturday. REUTERS/National Institute for Allergy and Infectious Diseases/Handout via Reuters (UNITED STATES - Tags: SCIENCE TECHNOLOGY HEALTH) ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS IMAGE. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS Reuters

Scientists step up their investigation of the Middle East Respiratory Syndrome virus after it spread from person to person in the U.S. NBC’s Tom Costello reports.

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