SEATTLE — Officials with Public Health - Seattle & King County are investigating an outbreak at a Seattle fitness center where several people who reported being fully vaccinated tested positive for COVID-19. .

Duchin said the health department was notified July 6 of six people who tested positive for the virus who recently spent time at the fitness center - Duchin did not provide the name of the facility. .

"This is an example of the type of venue where even vaccinated people need to take precautions," said Duchin, who was among the first officials in the state to recommend residents go back to universal mask-wearing in indoor public spaces.

“Breakthrough cases for any vaccine are normal and an expected phenomenon as more people are vaccinated," said Duchin

According to Duchin, in all of King County, there have been 1,489 breakthrough cases, which represents less than .1% of the vaccinated population