United States of America

Country · United States of America

• Seasonal influenza

  Influenza activity (WHO FluNet)

  Insufficient Data

  Why gray: Latest report is 5 weeks old (limit 4)

  Latest week reported: 2026-09-14

  Source: World Health Organization — FluNet — Global Influenza Surveillance and Response System · Reported to WHO by national influenza centres and laboratories in participating countries · Data through Oct 25, 2026Current · Checked today · Method

  Note: Levels compare each country with its own history (OWM-HIST-1); they are not WHO classifications.

• Mpox

  Mpox confirmed cases (WHO)

  Insufficient Data

  Why gray: Latest report is 25 weeks old (limit 8)

  Latest week reported: 2026-04-27

  Confirmed cases, last 12 reported weeks: 314

  Not enough history to chart

  Source: World Health Organization; redistributed by Our World in Data — WHO global mpox surveillance (via Our World in Data) · Data through May 3, 2026Historical · Checked today · Method

  Note: The public WHO mpox dataset is updated irregularly and can lag several months; when it is older than 8 weeks every country shows Insufficient Data.

• Avian influenza (H5N1)

  Human H5 detections reported to WHO FluNet

  2 detections

  Human H5 detections reported (52 weeks): 2

  Source: World Health Organization — FluNet — Global Influenza Surveillance and Response System · Reported to WHO by national influenza centres and laboratories in participating countries · Data through Oct 19, 2026Current · Checked today · Method

  Note: Covers only H5 detections reported through FluNet laboratories; WHO outbreak reports (shown as notices) may include cases not listed here.

• Measles

  Reported measles cases (WHO, annual)

  121 cases

  Year: 2023

  Reported cases: 121

  Source: World Health Organization; redistributed by Our World in Data — Reported measles cases (WHO immunization data via Our World in Data) · Data through 2024Historical · Checked today · Method

  Note: Annual totals officially reported by countries to WHO; the current year's outbreaks appear in WHO outbreak reports and national sources.