* Sixteen COVID-19 cases have been linked to the Holiday Inn at Melbourne Airport.

* Genetic testing has confirmed the virus is the highly-infectious UK variant.

* The outbreak is thought to have started with a family of three infected overseas and quarantined at the Holiday Inn.

* There are 21 active cases of the virus with 21,475 test results received up until midnight on Saturday.

* A three-year-old child and a woman in her 50s were the latest locally acquired infections reported on Sunday.

* They were put into isolation on Friday and tested positive on Saturday

* The pair, who are from separate households, were at a private family function on Sydney Road, Coburg on February 6.

* It was attended by 38 people including a Holiday Inn worker who tested positive on Wednesday.

* They are among the 940 primary close contacts associated with the Holiday Inn outbreak.

* Of the 129 direct family, social, and workplace close contacts, 127 have tested negative.

* Two test results are pending and are expected later on Sunday.

RECENT COVID-19 EXPOSURE SITES

Anyone who visited these locations must isolate, test and remain isolated for 14 days:

Thursday, February 11

* Yarra Trams No. 11 (from Harbour Esplanade/Collins St to William St/Collins St #3), 7.55am - 8.10am

* Yarra Trams No. 58 (from Bourke St/William St #5 to Queen Victoria Market/Peel St #9), 8.10am - 8.25am

* Queen Victoria Market, Melbourne (Section 2 Fruit and Vegetables and Section 2 female toilets), 8.25am - 10.10am

* Yarra Trams No. 58 (from Queen Victoria Market/Peel St #9 to Bourke St/William St #5), 9.40am - 9.55am

Wednesday, February 10

* Oak Park Sports and Aquatic Centre, Pascoe Vale, 4pm - 7.30pm

Tuesday, February 9

* Woolworths Broadmeadows Central, 12:15pm - 12:30pm

* Ferguson Plarre Bakehouses, Broadmeadows - 12:30pm - 12:45pm

Monday, February 8

* Elite Swimming, Pascoe Vale, 5pm - 6pm

Australian Associated Press