immunotherapy) people with non-hematologic malignant solid tumour receiving active treatment (specifically chemotherapy, targeted therapies of immunotherapy) transplant recipients on may 10, 2021, certain high-risk healthcare workers were allowed to receive a second dose at a shortened-interval according to a shortened interval second-dose strategy announced may 28, 2021 for those who received the two approved mrna vaccines (originally scheduled for 16 weeks), the government announced the following second-dose prioritization in this order: may 31: people aged 80+ province-wide can book a second-dose appointment june 7: people aged 70+ province-wide can book a second-dose appointment people who received their first dose on or before april 18, 2021, can book a second-dose appointment june 14: adults age 18+ living in toronto, peel region, halton, york region, waterloo, wellington–dufferin–guelph, and porcupine who received their first dose on or before may 9 can book a second-dose appointment june 21: adults age 18+ who received their first dose on or before may 9 province-wide can book a second-dose appointment june 23: adults age 18+ living in durham, halton, hamilton, peel, porcupine, simcoe-muskoka, toronto, waterloo, wellington–dufferin–guelph or york who received their first dose on or before may 30 can book a second-dose appointment june 26: youth aged 12–17 living in durham, halton, hamilton, peel, porcupine, simcoe-muskoka, toronto, waterloo, wellington–dufferin–guelph and york june 28: all remaining adults can book a second shot with a 28-day interval people who received the oxford-astrazeneca vaccine can book a second shot of either oxford-astrazeneca or an mrna vaccine at an interval of 8 weeks. 3 july 2021 phase 3 all remaining eligible ontarians former vaccine task force members on august 31, 2021, the vaccine task force was dismissed. dr. homer tien, trauma surgeon and president and ceo, ornge (chair) mario di tommaso, deputy solicitor general, community safety, commissioner of emergency management (vice-chair) helen angus, deputy minister of health (vice-chair) ontario regional chief roseanne archibald of taykwa tagamou nation dr. isaac bogoch, infectious diseases consultant and internist, toronto general hospital dr. dirk huyer, ontario's chief coroner angela mondou, president and ceo, technation mark saunders, former toronto police chief dr. maxwell smith, bioethicist and assistant professor, university of western ontario dr. regis vaillancourt, director of pharmacy, children's hospital of eastern ontario resigned linda hasenfratz, ceo of linamar, resigned due to her travel outside of the country in december 2020 general (retired) rick hillier, former chief of defence staff for the canadian forces (chair), stepped away from role following the end of his contract on march 31, 2021 dr. kieran moore, former medical officer of health, kingston, frontenac, lennox & addington public health stepped away from the role to become chief medical officer of health for ontario