To visit Canada, tourists must have a valid travel document and identification, be in good physical health and have enough money for the entire stay. In some circumstances, a health examination and other requirements must be met.
Most people visiting Canada need to have a valid passport or other travel document. If someone looks to be seriously ill, they will most likely not be allowed entry into the country. Some immigration officers at the border want to know that the person has a reason to go back to their home country after visiting, such as work or family. To gain entry, the person can’t have a criminal conviction. Some people need to pass a medical examination or get a letter of invitation from someone that lives in Canada, though this is more of a unique situation.