Several provinces began expanding their COVID-19 vaccination programs to members of the general population on Monday amid the prospect of more regular deliveries and the imminent arrival of a third approved vaccine. Ontario, Quebec and B.C. started or announced plans to start vaccinating older seniors living in the community, after a first phase that focused largely on health-care workers, remote communities and long-term care. In Montreal, mass vaccine sites including the Olympic Stadium opened their doors to the public as the province began inoculating older seniors who live in the hard-hit city. The government announced last week it would begin booking appointments for those aged 85 and up across the province, but that age limit has since dropped to 70 in some regions, including Montreal. The province has already finished vaccinating long-term care residents with a first dose and was almost finished in private seniors homes, the premier said Saturday. …