The State of Emergency declared last month was originally due to expire on April 13.

But Mr Andrews announced on Sunday that it would now be extended until midnight on May 11 to "continue the measures designed to flatten the curve of coronavirus and give our health system the best chance of managing the virus".

"There are positive signs our efforts are working - but if we relax now, our hard-won gains will evaporate and people will die," he said.

"This is an unprecedented crisis - we need to extend the State of Emergency to help slow the spread of the virus, protect our health system and save lives."

Under a State of Emergency, authorised officers at the direction of the chief health officer can act to eliminate or reduce a serious risk to public health by detaining people, restricting movement, preventing entry to premises, or providing any other direction considered reasonable to protect public health.

The month-long extension will ensure the government can continue its strict enforcement of social distancing, isolation and other vital directions put in place by the chief health officer to slow the spread of the virus.

The announcement comes after a seventh person tested positive to COVID-19 at the Western District Health Service drive-through clinic on Saturday.

The man's partner was also tested on Thursday and is awaiting her results, WDHS said in a statement.

Both returned from an overseas trip before hotel quarantine regulations came into effect and have been isolating in the Glenelg Shire.

There are currently two positive cases in the Southern Grampians Shire, one in Corangamite Shire, one in Moyne Shire and five in Warrnambool City.

The additional positive cases detected at the WDHS drive-through in recent weeks live interstate or in neighbouring shires.

There are only four reasons to leave your home: food and supplies, medical care and caregiving, exercise, and work or education.

Police have strong powers to enforce these directions and can issue on the spot fines, including up to $1,652 for individuals and up to $9,913 for businesses.

Under the State of Emergency people who don't comply could also be taken to court and receive a fine of up to $20,000. Companies face fines of up to $100,000.

Since March 28, Victoria Police have conducted 19,303 spot checks at homes, businesses and non-essential services across the state and issued over 900 fines.

There has been one known fine issued across the south-west.

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