SAN FRANCISCO (CBS SF) — San Francisco International Airport is one of 22 U.S. airports to receive notice of a potentially deadly respiratory virus from the Middle East after a second case was confirmed in the U.S.

The Centers of Disease Control and Prevention has posted a health advisory at the airports because of the spread of Middle East Respiratory Syndrome (MERS).

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health advisoryThe CDC said two health care workers in Orlando have come down with MERS and that at least 100 more people may have been exposed at two Florida hospitals.

Both of the Orlando patients had recently traveled to Saudi Arabia but their cases are not connected.

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The MERS infection has already killed an estimated 145 people worldwide, according to the CDC. Symptoms include fever, cough and breathing problems, which can lead to pneumonia and kidney failure.

The airports receiving the MERS advisory from the CDC are:

  • Atlanta (ATL)
  • Baltimore (BWI)
  • Boston (BOS)
  • Charlotte (CLT)
  • Chicago (ORD)
  • Dallas/Fort Worth (DFW)
  • Denver (DEN)
  • Detroit (DTW)
  • Houston (IAH)
  • LaGuardia (LGA)
  • Las Vegas (LAS)
  • Los Angeles (LAX)
  • Miami (MIA)
  • Minneapolis/St Paul (MSP)
  • Newark (EWR)
  • New York (JFK )
  • Orlando (MCO)
  • Philadelphia (PHL)
  • San Diego (SAN)
  • San Francisco (SFO)
  • Seattle (SEA)
  • Washington (IAD)
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