Four more cases of dengue fever on Hawaii island were confirmed by the state Department of Health today. That brings the recent number of locally acquired cases of dengue fever to 23. 

In each case, the infected individual was on Hawaii island. 

Dengue is a viral infection spread via mosquitoes that bite an infected person and then carry the virus to the next person. People cannot infect other people. 

While dengue is not endemic to Hawaii, it is intermittently imported from endemic areas by infected travelers. 

The recent cases mark the first cluster of locally acquired dengue fever since the 2011 outbreak on Oahu, when four cases were confirmed.