The Hawai‘i Department of Health has confirmed one additional case of pertussis (also known as whooping cough) in a third distinct region on Hawaiʻi Island which is unrelated to previous cases. This new case closely follows 10 recently reported cases and brings the total to 11 pertussis cases on the Island from March – April 2024. Several of the recent cases have occurred in infants too young to be fully vaccinated.