According to South Korea news agencies, the country’s first outbreak of Middle East respiratory syndrome (MERS) since 2015 has been declared over.

The announcement made at midnight is in line with guidelines set by the World Health Organization that requires no new infections for a minimum of 28 days, which is twice the length of the virus’ incubation period, the Korea Centers for Disease Control and Prevention (KCDC) said.

On Sept 8, a single person was diagnosed with MERS after returning home from a three-week business trip to Kuwait via the United Arab Emirates. It was the first confirmed case of the disease in the country since 2015.

South Korea was hit by an outbreak in 2015, resulting in 38 deaths and 186 people testing positive for MERS.