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MERS

MERS - Photo Credit: NIH-NAID
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Overview

QUICK FACTS
  • At this time, there are no cases of MERS in the U.S. The ongoing outbreak is limited to Saudi Arabia and the United Arab Emirates (UAE). South Korea, China, Thailand, and the Philippines have experienced recent cases of MERS.
  • Currently, there is minimal risk of exposure to MERS and MERS-CoV to U.S. workers. However, exposure to the virus or someone with MERS may be more likely in certain jobs, including in healthcare, medical transport, laboratories, mortuary/death care, and airline operations.
  • MERS-CoV is not transmitted readily among the general population. Scientists believe the virus spreads from person-to-person through close contact, such as healthcare workers caring for infected patients or people living with an infected person.
  • Employers must take steps to protect their workers from exposure to MERS-CoV on the job. OSHA has developed interim guidance to help prevent worker exposure to MERS-CoV and persons with the disease.

Middle East Respiratory Syndrome (MERS) is an emerging viral respiratory disease that primarily affects the lungs and breathing passages. It is caused by the coronavirus MERS-CoV.† MERS was first reported in Saudi Arabia in 2012. At least 25 other countries have reported confirmed cases of MERS. So far all cases of MERS link to countries in and near the Arabian Peninsula. The disease has spread to other regions, including the United States (U.S.), Europe, and South Korea through travel-associated cases. Only two (2) patients in the U.S. have tested positive for MERS-CoV infection out of more than 500 suspected cases of MERS. Both positive cases occurred in May 2014 in individuals visiting the U.S. from Saudi Arabia.1

The most recent MERS-CoV outbreak-primarily impacting South Korea-is the largest outside the Middle East. The World Health Organization (WHO) provides up-to-date information on outbreaks of MERS on its Outbreaks and Emergencies web page.

MERS-CoV does not generally spread among the general population in areas affected by an outbreak, but is thought to spread from person to person through close contact, such as healthcare workers caring for infected patients, or people living with an infected person. There is no evidence to date of MERS-CoV spread in a sustained pattern in communities.2,3

MERS symptoms – in the majority of cases – include cough, shortness of breath, and fever. Some people may also experience gastrointestinal symptoms, such as nausea, vomiting, and diarrhea. More severe complications such as pneumonia and kidney failure can also occur.4 Approximately 35 percent of patients infected with MERS-CoV die from the illness.5 Treatment for this viral infection is supportive based on the medical condition of the patient. No vaccine or chemoprophylaxis (e.g., an effective antiviral medicine) currently exists for MERS.

Most workers in the U.S. are unlikely to encounter MERS-CoV or individuals with MERS. People who may be at increased risk for MERS include travelers returning from the Arabian Peninsula, close contacts with an ill traveler from the Arabian Peninsula, close contacts with a confirmed case of MERS, and healthcare personnel not following recommended infection-control practices. The majority of cases in the South Korean outbreak resulted from human-to-human transmission in healthcare settings, including some cases attributable to suboptimal infection prevention and control in such facilities.6 In addition to healthcare, other sectors with some risk for exposure include laboratories, mortuaries, medical transportation and airlines.

This web page provides information about MERS-CoV and MERS for workers and employers. The web page includes sections on:

Background

Provides background information on MERS-CoV including source and transmission.

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Hazard Recognition

Highlights information on how to recognize the risk of infection.

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Medical Information

Provides information on symptoms, and treatment.

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Standards

Elements of infection control for MERS-CoV, including a number of precautions for diseases for which the route(s) of transmission may be uncertain, are covered under OSHA's PPE standards, the BBP standard, as well as Section 5(a)(1) of the OSH Act of 1970, 29 USC 654(a)(1), (often referred to as the General Duty Clause).

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Control and Prevention

Provides interim guidance developed by OSHA to help prevent worker exposure to MERS-CoV and persons with the disease.

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Additional Resources

Provides links and references to additional resources related to MERS-CoV.

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QUICK FACTS
  • At this time, there are no cases of MERS in the U.S. The ongoing outbreak is limited to Saudi Arabia and the United Arab Emirates (UAE). South Korea, China, Thailand, and the Philippines have experienced recent cases of MERS.
  • Currently, there is minimal risk of exposure to MERS and MERS-CoV to U.S. workers. However, exposure to the virus or someone with MERS may be more likely in certain jobs, including in healthcare, medical transport, laboratories, mortuary/death care, and airline operations.
  • MERS-CoV is not transmitted readily among the general population. Scientists believe the virus spreads from person-to-person through close contact, such as healthcare workers caring for infected patients or people living with an infected person.
  • Employers must take steps to protect their workers from exposure to MERS-CoV on the job. OSHA has developed interim guidance to help prevent worker exposure to MERS-CoV and persons with the disease.
Workers' Rights

Workers have the right to:

  • Working conditions that do not pose a risk of serious harm.
  • Receive information and training (in a language and vocabulary the worker understands) about workplace hazards, methods to prevent them, and the OSHA standards that apply to their workplace.
  • Review records of work-related injuries and illnesses.
  • File a complaint asking OSHA to inspect their workplace if they believe there is a serious hazard or that their employer is not following OSHA’s rules. OSHA will keep all identities confidential.
  • Exercise their rights under the law without retaliation, including reporting an injury or raising health and safety concerns with their employer or OSHA. If a worker has been retaliated against for using their rights, they must file a complaint with OSHA as soon as possible, but no later than 30 days.

For additional information, see OSHA's Workers page.

How to Contact OSHA

Under the Occupational Safety and Health Act of 1970, employers are responsible for providing safe and healthful workplaces for their employees. OSHA’s role is to ensure these conditions for America’s working men and women by setting and enforcing standards, and providing training, education and assistance. For more information, visit www.osha.gov or call OSHA at 1-800-321-OSHA (6742), TTY 1-877-889-5627.


† Before the announcement of the MERS-CoV name by the Coronavirus Study Group7, other names used for isolates of the virus included Novel Coronavirus (NCoV).


1 National Library of Medicine, "Middle East Respiratory Syndrome (MERS)."

2 California Department of Public Health, "Middle East Respiratory Syndrome Coronavirus (MERS-CoV) Quicksheet".

3 WHO MERS-CoV Research Group, "State of Knowledge and Data Gaps of Middle East Respiratory Syndrome Coronavirus (MERS-CoV) in Humans," PLOS Currents Outbreaks, 1 (2013).

4 Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, "Patient Under Investigation (PUI)."

5 Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, "People Who May Be at Increased Risk for MERS."

7 De Groot, R.J., Baker, S.C., Baric, R.S., et al., "Middle East Respiratory Syndrome Coronavirus (MERS-CoV): Announcement of the Coronavirus Study Group," Journal of Virology, 87, 7790-7792 (2013).

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