Cluster of COVID-19 cases under investigation on Big Island

Kelsey Walling/Tribune-Herald University of Hawaii at Hilo pharmacy student Minneh Oyas gives a COVID-19 vaccine to a caregiver during drive-through vaccinations Thursday at Hawaii Island Adult Care.

Eighteen COVID-19 cases are associated with a single cluster under investigation on the Big Island, according to a weekly cluster report released Thursday by the state Department of Health.