I think it would just be common sense for either the bus driver or the person, if he's ill, if he's sick enough, to try to seek medical attention before getting to the border, because in most cases, the best medical attention would be in medical facilities on either side of the border and not at the border. However, if there is a situation where someone actually lands at the border, certainly our customs officials can identify that person and have him sent for further follow-up at a medical hospital.
The requirement for advance reporting is really a practical application in that if someone is on an airplane, there's no way to disembark and go to a medical facility in advance of landing at the port of destination. Therefore, it is practical to have advance reporting so the officials, including quarantine at the airport in Toronto, can make the necessary arrangements to welcome the plane when it finally lands and have the person, obviously, forwarded for medical attention.