CDC U.S. measles cases (weekly report, year to date, by rash-onset week and by year, with deaths and hospitalisations) release schedule and API

Next releases

From the agency's own calendar, as of 2026-11-13. Reschedules and cancellations are in the API.

How fast it reaches the API

Time from the agency publishing to the data being on our feed, for releases caught live in the last 30 days. Every release counts, including slow ones and misses.

Get it by API

Series ids: US.MEASLES.CASES_YTD.NSA.

# pip install econfeed-client
from econfeed_client import Client

ef = Client()  # ECONFEED_API_KEY from the environment
for e in ef.calendar(days=90, source="us_cdc_measles"):
    print(e.scheduled_at, e.release_name, e.reference_period)

# add as_of= for what was known then
page = ef.observations("US.MEASLES.CASES_YTD.NSA", start="2024-01")

# pushed seconds after release
for ev in ef.stream(sources=["us_cdc_measles"]):
    print(ev.type, ev.data.release_id)

REST: GET /v1/calendar?source=us_cdc_measles, GET /v1/series/US.MEASLES.CASES_YTD.NSA/observations. Webhooks: filter on source us_cdc_measles.