Health Canada says Canadian residents are allowed to drive to the U-S for a COVID-19 vaccine and avoid quarantine on return, provided they meet some conditions.
You have to have a note from a licensed health-care provider in Canada that the inoculation is medically necessary.
You then have to show written proof of the shot from the licensed U.S. vaccine provider.
The trip to the U-S must be in a private vehicle and tacking on shopping or other non-essential activities is a no-no.
Health Canada says border agents have final say.