WA has seen its biggest jump in confirmed cases of coronavirus today with the health department revealing there has been ten new cases in the past 24 hours.

Among the new cases are three healthcare workers.

The 55 per cent jump in positive diagnoses takes the current number of confirmed cases in the state to 28.

The government said this afternoon that all of the new cases were residents from the Perth metropolitan region and that two lots of husband and wives were among those who had contracted COVID-19.

One of the other confirmed cases had reportedly recently returned to Perth from Hawaii.

Premier Mark McGowan said there was still no evidence of community transmission in WA.

Health Minister Roger Cook said all ten of WA’s new cases had recently returned from overseas. Five from North America, three from Britain, one via Doha and one whose travel was still to be confirmed.

Three of the cases were health care workers who had all returned to work after flying back to WA.

Mr Cook said more details would be provided in coming days about their places of work.

Contact tracing to identify people who had potentially been exposed to the health care workers was under way.

One of the ten new cases is in a serious but stable condition at Sir Charles Gairdner Hospital. The other nine are in self isolation at home.