Outbreak history on July 23

Historical outbreak-response milestones recorded on this calendar date, drawn from WHO Disease Outbreak News, CDC archives, and primary epidemiological literature.

• 2022

  WHO declares mpox (monkeypox) a PHEIC

  WHO declared the multi-country outbreak of mpox (monkeypox) a Public Health Emergency of International Concern. The outbreak had spread to over 75 countries and territories, with most cases in men who have sex with men — an epidemiological pattern previously not documented for mpox, which had been considered endemic to Central and West Africa.

  Glossary: PHEIC

Browse the full outbreak history calendar for milestones across all dates.