MERS-CoV

WHO EMRO logged two new MERS-CoV cases since 4 May 2026, including one death in Saudi Arabia, bringing the 2026 Saudi total to two cases and one death. No sustained human-to-human transmission has been identified, and ECDC rates the risk to the EU as very low. The threshold for concern is evidence of person-to-person transmission chains; that has not appeared.

MERS-CoV (Middle East Respiratory Syndrome coronavirus) was first identified in Saudi Arabia in 2012 and causes sporadic cases on the Arabian Peninsula, predominantly via contact with infected dromedary camels, the confirmed animal reservoir. Documented human-to-human transmission has occurred only in healthcare settings and within households with close prolonged contact; no sustained community spread has ever been recorded. The historical case-fatality ratio across all confirmed cases since 2012 sits at approximately 35%, against roughly 0.1% for seasonal flu, making any confirmed case a surveillance priority even when the numbers are small.

The 2026 Saudi tally of two cases and one death fits within the long-running sporadic baseline. MERS earns consistent surveillance coverage because of its lethality and its pandemic-risk profile: a mutation enabling efficient respiratory spread would represent a qualitatively different threat. That shift has not occurred, and the case pattern from each WHO EMRO update is read against that baseline. Until the transmission picture changes, the case count is monitored rather than acted on.