According to Chatham-Kent’s Medical Officer of Health, people should consider themselves fully vaccinated against COVID-19 only when they have had three shots.

“We still have a substantial number of people who have not received their third shot, and with Omicron, being fully immunized should mean three shots,” said Dr. David Colby. “It’s not two shots that constitute full immunization when we’re dealing with Omicron and its subvariants that are circulating now. Two shots just don’t cut it anymore.”

https://www.msn.com/en-ca/news/other/moh-says-two-doses-no-longer-means-being-fully-vaccinated/ar-AAW6Gi2?