What we know now
As of September 16, 2026, Delaware health officials said the state was experiencing a measles outbreak. The latest count in a registered official release was four cases in Kent County as of July 22; newer discovery reports were not used for the count.
The cited official sources describe this event as active as of Sep 16, 2026.
Cited update: Delaware Division of Public Health
Where it has been reported
The cited record identifies Kent County, Delaware.
These locations come from the cited sources and are not a personalized risk map.
See every source-supported area ↑Reported cases and outcomes
As of Sep 16, 2026, 4 reported cases.
The record does not provide totals for hospitalizations and deaths; missing values do not mean zero.
Return to the situation facts ↑What the source recommends
Delaware DPH advises people who are unvaccinated or unsure of their vaccination status to contact a health care provider or public health clinic about MMR vaccination.
This guidance is attributed to the linked official source; check that source for changes.
See the event-specific guidance ↑How we verified this update
This record links 2 official sources.
The primary cited source is Delaware Division of Public Health.
Counts and status are presented as of Sep 16, 2026; a later source update may change them.
The CDC link provides general condition background and does not verify this specific event.
Review this alert’s sources ↑Frequently asked questions
What is the current status of this event?
The cited official sources describe this event as active as of Sep 16, 2026.
Where has this event been reported?
The cited record identifies Kent County, Delaware. These locations come from the cited sources and are not a personalized risk map.
How many cases have been reported?
As of Sep 16, 2026, 4 reported cases. The record does not provide totals for hospitalizations and deaths; missing values do not mean zero.
What is known about the cause or exposure?
The record identifies the pathogen as Measles.
What actions does the official source recommend?
Delaware DPH advises people who are unvaccinated or unsure of their vaccination status to contact a health care provider or public health clinic about MMR vaccination. This guidance is attributed to the linked official source; check that source for changes.
How was this update verified?
This record links 2 official sources. The primary cited source is Delaware Division of Public Health. Counts and status are presented as of Sep 16, 2026; a later source update may change them. The CDC link provides general condition background and does not verify this specific event.