Measles

Infections. Also called: Rubeola.

How common is Measles in the US?

Confirmed measles cases reported to CDC: 338 (Cases over the whole period, not a rate; United States, January 1, 2020 to March 28, 2024). Source: MMWR Morbidity and Mortality Weekly Report (CDC), 2024. Label: VERIFIED.

• 338 Confirmed measles cases reported to CDC. Out of: Cases over the whole period, not a rate. Where: United States. When: January 1, 2020 to March 28, 2024. Confirmed, reported cases only. Label: VERIFIED.

  During January 1, 2020-March 28, 2024, CDC was notified of 338 confirmed measles cases; 97 (29%) of these cases occurred during the first quarter of 2024, representing a more than seventeenfold increase over the mean number of cases reported during the first quarter of 2020-2023.

  Source: Measles - United States, January 1, 2020-March 28, 2024. MMWR Morbidity and Mortality Weekly Report (CDC), 2024. PubMed 38602886. DOI 10.15585/mmwr.mm7314a1.

Each figure measures something different. Do not compare them with each other or with other conditions.

Medical codes

• ICD-10-CM FY2026: B05.9 Measles without complication (narrower). Other codes in this category also apply.

Research activity

As of 2026-09-24: 202 registered studies on ClinicalTrials.gov (search Measles) and 4,067 PubMed records, 2021 to 2025. A count of records is not how common or serious the condition is.

Population information, not medical advice. Methodology · Known limitations