Health authorities are still searching for the source of a measles outbreak in the Pilbara as cases persist in the community.

One new case was reported on Thursday, bringing the region’s most recent cluster to eight as contact tracers scramble to identify patient zero.

Hedland Health Campus remains a major exposure site, with three new timeframes added to the public health alert.

WA Health is urging residents and travellers to the region to stay vigilant for measles symptoms “following confirmed community transmission in the Hedland and Karratha areas”.

“Several measles cases have been identified with no known source, indicating there have been unidentified cases in the community,” the latest health alert said.

“This has likely been introduced from travellers returning from overseas.”

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