BELLINGHAM, Wash. — A passenger who boarded the Alaska Ferry in Bellingham has tested positive for COVID-19.

The Alaska Marine Highway System says the traveler tested negative before boarding the Kennicott on June 27.

They apparently tested positive for the virus eight days later after they arrived in Cordova, Alaska.

The AMHS tells Anchorage Daily News the person’s only close contact onboard later tested negative for the disease.

Officials don’t know when and where they became infected.