There may be an opportunity for you to sponsor them later, but only once you've lived and worked in Canada for three years and meet the minimum income requirements. There are limited spots available for parent sponsorship and the current process is to give those spots out through a lottery. Assuming you eventually qualify and are picked, your parents will need to pass a medical in order to be approved and this will include assessing if they have any significant health conditions that may pose a burden to the Canadian health care system. So definitely possible to sponsor them later and that's what it involves. Hope that helps.
