The World Health Organization has declared monkeypox a global health emergency, as the once-rare virus spreads rapidly in Europe and other parts of the globe.
More than 16,800 cases of monkeypox have been reported in 74 countries this year. Many of those are in places that have never reported monkeypox infections before. In the United States, at least 2,890 cases have been identified, according to the Centers for Disease Control and Prevention.