TRAVIS AIR FORCE BASE (CBS13) – Health officials say the handful of passengers isolated after being flown to Travis Air Force Base have tested negative for the coronavirus.

A total of 233 Americans evacuated from the Wuhan region of China – the heart of the coronavirus outbreak – are being quarantined at Travis Air Force Base.

READ MORE: Investigation Continues After Homeowner Shot In N. Highlands

RELATED: What Does It Mean To Be Quarantined? And Who Pays For It?

READ MORE: Fire Breaks Out At Home In Ceres

Of that number, the Centers for Disease Control said five passengers had been under isolation and undergoing medical evaluation after they showed symptoms of the potentially deadly virus. However, on Wednesday, officials announced that samples from the passengers had tested negative.

Travis AFB is one of the four bases where coronavirus evacuees are being quarantined.

MORE NEWS: FAA Clears Some Commercial Planes For Low-Visibility Landings After Warning 5G Could Interfere With Instruments

There are a total of 13 confirmed cases of the coronavirus in the US, according to the CDC.