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The Middle East respiratory syndrome virus (MERS) has infected more than 500 people since it was first identified in 2012, spread to 16 countries, including at least three cases in the United States, and killed about a quarter of its victims.

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Thailand Fights to Prevent MERS Outbreak Thailand Fights to Prevent MERS Outbreak Thailand Fights to Prevent MERS Outbreak Thailand Fights to Prevent MERS Outbreak

Thailand Fights to Prevent MERS Outbreak

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South Korea Declares Itself Out of MERS Danger South Korea Declares Itself Out of MERS Danger South Korea Declares Itself Out of MERS Danger

South Korea Declares Itself Out of MERS Danger

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Three More Die in South Korea's MERS Outbreak, Death Toll at 23 Three More Die in South Korea's MERS Outbreak, Death Toll at 23 Three More Die in South Korea's MERS Outbreak, Death Toll at 23

Three More Die in South Korea's MERS Outbreak

'Doctor Shopping' Helped Spread MERS, World Health Organization Says

South Korea Reports Seven New Cases of MERS, Brings Total to 145

South Korea Reports Four New Cases of MERS, Total 126

MERS Is No Reason to Close Schools, WHO Tells S. Korea

MERS Outbreak Worsens in South Korea

Sixth Person Dies of MERS Virus in South Korea

MERS Outbreak: Fifth Person Dies of Middle East Respiratory Syndrome in South Korea

As MERS Fears Spread, History Offers Sobering Lesson

What is MERS? And Other Questions About the Outbreak

Two People Die of MERS in South Korea

Hong Kong Quarantines 18 Over MERS Fears

MERS Spreads to China from Korean Outbreak

MERS Outbreak Could Spread With Annual Pilgrimage: Officials

New Report Nails Camels As A Direct Source of MERS

Saudi Officials Find 'Extra' MERS Cases

CDC Backtracks: Illinois Man Didn't Have MERS After All

Officials: No Signs of MERS in 16 LA County Residents

MERS Cure? Lots of Drugs Might Fight Virus, Study Finds

Illinois Man is Third U.S. MERS Infection, CDC Says

No Evidence MERS Spread in Florida Hospital, Officials Say

Second MERS Case Shows Hospitals Are Ground Zero for MERS

MERS No Global Emergency Yet, WHO Says

Florida Hospital Workers Who Treated MERS Patient Also Ill

Camels Confirmed As Source of MERS Virus

MERS Search: Disease Detectives Beat Bushes for Virus

First US MERS Patient Leaves Hospital

Second MERS Case Confirmed

MERS in the U.S.: Why You'll See More of It

Second U.S. MERS Case Found in Florida

How to Stop MERS: Gloves, Masks and Goggles

MERS Patient Is Well, Does Not Seem to Have Infected Others

MERS Spreads in Saudi; 1st US Case Stable In Hospital