COVID-19 trends had Ontario rolling back emergency hospital measures and mulling whether to reopen sooner than scheduled on Thursday, although concerns mounted over a new variant gaining ground in the province.Worries over the more contagious Delta variant, first detected in India, had the government considering whether to allow residents to book their second vaccine doses sooner and critics cautioning against easing public health measures too quickly.Health Minister Christine Elliott said the government was assessing the latest data to determine whether the province’s reopening plan — currently set to take effect June 14 — could kick in earlier.