Previously, there have been 5 public health emergencies of international concern declared:
🚨 2009 H1N1
🚨 2014 polio
🚨 2014 Ebola in West Africa
🚨 2016 Zika
🚨 2019 Ebola in the Democratic Republic of the Congo pic.twitter.com/HENllDwOSx

— World Health Organization (WHO) (@WHO) January 30, 2020