* 30 new COVID-19 cases, including a health worker at the Orygen youth mental health facility and a McDonald's worker.

* Seven of the new cases are linked to known outbreaks.

* Five are returned travellers in hotel quarantine.

* Five detected through routine testing.

* 13 cases remain under investigation.

* 183 active cases.

* Six people in hospital with the virus, one in ICU.

* Victoria has recorded 1947 cases, and more than 1700 people have recovered.

CLUSTERS GROW:

* 19 people now linked to Keilor Downs family outbreak.

* 15 linked to North Melbourne family (formerly known as the H&M Northland cluster).

* 15 linked to Coburg family outbreak.

* St Monica's outbreak renamed Wollert outbreak, includes the McDonald's worker and three linked to a social gathering in the suburb.

TESTING BLITZ BEGINS:

* 20,000 people tested on Thursday, with virus hot spots of Keilor Downs, Broadmeadows, Maidstone, Albanvale, Sunshine West, Hallam, Brunswick West, Fawkner, Reservoir and Pakenham prioritised.

* 70 per cent uptake of tests in the areas.

* "I believe that not everybody who has been offered testing has taken it up. It is disappointing." - Deputy Chief Health Officer Dr Annaliese van Diemen.

TENTH DAY IN A ROW OF DOUBLE-DIGIT NUMBERS:

*Today: 30

*25/6: 33

*24/6: 20

* 23/6: 17

* 22/6: 16

* 21/6: 19

* 20/6: 25

* 19/6: 13

* 18/6: 18

* 17/6: 21

Australian Associated Press