COVID-19 vaccination rollout to more target groups on Sunday ahead of an expected boost in nationwide shipments of the Pfizer vaccine that could lend ammunition to the provinces’ fights against the spread of contagious variants.The Ontario government reported Sunday that all long-term care residents across the province had been “given an opportunity” for a first dose of COVID-19 vaccine.The province’s vaccine taskforce told regional public health officers in a memo that it is expanding its focus in the coming weeks, with staff and essential caregivers in long-term care homes, top priority health-care workers and Indigenous adults in remote and higher risk communities among those first in line for the vaccine.