Suspect case :

• A person with fever and community-acquired pneumonia or acute respiratory distress syndrome based on clinical or radiological evidence.
• A hospitalized patient with healthcare-associated pneumonia based on clinical and radiological evidence.
• A person with:
  1. acute febrile (≥38°C) illness, AND
  2. body aches, headache, diarrhea, or nausea/vomiting, with or without respiratory symptoms, AND
  3. unexplained leucopenia (WBC<3.5×109/L) and thrombocytopenia (platelets<150×109/L).
• A person (including health care workers) who had protected or unprotected exposure to a confirmed or probable case of MERS-CoV infection and who presents with upper or lower respiratory illness within 2 weeks after exposure.

Probable case:

A probable case is a patient in category I or II above with absent or inconclusive laboratory results for MERS-CoV and other possible pathogens who is a close contact of a laboratory-confirmed MERS-CoV case or who works in a hospital where MERS-CoV cases are cared for.

Confirmed case:

A confirmed case is a suspect case with laboratory confirmation of MERS-CoV infection.