COVID-19 Disease Clusters in Hawaii

A disease cluster refers to multiple cases of a disease occurring at one time, in one geographic location, or among people with the same or similar shared exposures. Public health officials investigate and study disease clusters because they can provide important information about how diseases are transmitted between individuals and among groups of people; this information can then be used to identify risk factors, inform official recommendations, design interventions, and implement policies to prevent, mitigate, and stop the spread of that disease in communities. This report summarizes COVID-19 clusters that have been identified through statewide case investigation and contact tracing efforts and are actively under investigation within the State of Hawai‘i during the specified reporting week.

Cluster reports are uploaded every Thursday by 1pm. If there is a holiday on a Thursday, the cluster report will be uploaded the following business day.

COVID-19 Cluster Reports

Latest Update

An outdoor graduation party where physical distancing was not consistently enforced left 8 out of 15 attendees with COVID-19. Two clusters related to places of worship were investigated.

An outdoor graduation party where physical distancing was not consistently enforced left 8 out of 15 attendees with COVID-19. Two clusters related to places of worship were investigated.


Restaurant workers have an increased risk of contracting COVID-19 when masks are not worn properly and other COVID-19 safety guidelines are not followed.

Two in-person employee training events where masks were not required led to multiple COVID-19 cluster investigations.

A cluster from a construction site on Oahu was investigated. A cluster at a Molokai hospital construction site is currently being investigated.


Singers and performing artists’ occupational settings prove to be high-risk, in regards to contracting and transmitting COVID-19.

A surge of COVID-19 cases on Kaua’i led to an investigation revealing changes in county disease patterns, three large exposure events, and four disease clusters.

The Hawai’i Department of Health collaborated with District Health Offices to provide guidance on the reopening of campuses across the islands.


Summarized are the challenges associated with controlling the spread of COVID-19 in the food service industry.

Topics discussed include the COVID-19 incubation period, quarantine protocols, and testing recommendations of close contacts.

The Hawai’i State Department of Health investigates a COVID-19 cluster impacting a college football team.


Disease cluster investigations were held in congregate settings to facilitate safe services and prevent the risk of contracting COVID-19.

Spillover clusters within the school and hotel industry settings are the topics of discussion, further emphasizing protection protocols.

The Hawai’i State Department of Health initiates a Native Hawaiian and Pacific Islander Outreach and Investigations Team.


Travel related COVID-19 cases were discovered. The B.1.1.7 variant was found in travelers who recently visited Las Vegas, Nevada.

The Hawai’i State Department of Health analyzes COVID-19 specimens found in the state to identify new variants.

Challenges between the cleaning service industry while still following COVID-19 safety measures pose problems.


The need for effective public health communication in a multitude of languages proves extreme relevance.

The investigation of COVID-19 clusters in the food service industry pose challenges to the global pandemic.

The Hawai’i State Department of Health are investigating two clusters in the state associated with agricultural settings.


Two clusters associated with accommodation settings were investigated.

COVID-19 clusters were found in construction and industrial settings.

Cases of COVID-19 were associated with a Maui residential apartment complex.


Clusters have been identified in correctional and detention facilities.

Included in this week’s cluster report are tips on how to safely celebrate New Year’s.

Clusters were found at churches, temples, and other places of worship.


In these clusters, social gatherings led to increased COVID-19 exposure and transmission.

COVID-19 clusters were found at gyms and other exercise settings.

Clusters have been found at restaurants, bars, and coffee shops.


Clusters have occurred among individuals who spent significant amounts of time together on ships, boats, and other maritime vessels.

A COVID-19 case investigation involved an intermediate school on Oahu required contact
tracing more than one hundred individuals.

A Lanai community cluster and a cluster from apartment complexes on Hawai’i island were identified.