The virus appears to be spreading among travelers, prompting SFO and other airports to post the signs, which describe the symptoms of MERS and recommend steps travelers can take to stay healthy.
The MERS virus first appeared in residents of Saudi Arabia in 2012, but cases have since been reported in Jordan, Qatar, the United Arab Emirates, Oman and Kuwait, according to the San Francisco Department of Public Health. The disease has spread to travelers and cases have also been identified in Europe, North Africa and the United States.
The airport signs list symptoms as fever, cough and shortness of breath, and ask that travelers who get sick within 14 days of visiting the Arabian Peninsula to contact a doctor.
Travelers are also asked to wash their hands often, avoid touching their faces and avoid contact with sick people.