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In Canada, as of September 13, 2021, the following four COVID-19 vaccines are authorized for use by Health Canada: Pfizer-BioNTech (mRNA), Moderna (mRNA), AstraZeneca/COVISHIELD (viral vector) and Janssen/Johnson & Johnson (viral vector).

Individuals Vaccinated outside of Canada/Ontario

• Individuals who have received a partial or complete COVID-19 vaccine series outside of Ontario or Canada should contact their local public health unit to have their COVID-19 immunization record documented in COVaxON prior to receiving any additional doses and for their vaccination receipts..

• Proof of immunization (e.g., an immunization record, proof of vaccination certificate (PVC) is required to verify the COVID-19 vaccine product received.

• All vaccine doses administered out of province (regardless of the vaccine product) should be reported, verified and documented by public health units into COVaxON.

Individuals Vaccinated with COVID-19 vaccines not authorized by Health Canada

• Individuals who have proof of immunization and have received a complete one or two-dose series of a COVID-19 vaccine that is not authorized for use by Health Canada will be offered one additional dose of an mRNA vaccine. The minimum interval between the preceding dose and the additional dose should be 28 days. If the individual has already received three doses of a non-Health Canada authorized COVID-19 vaccine at the appropriate interval, no additional doses should be offered at this time.

• Individuals who have proof of immunization and have received an incomplete series of a non-Health Canada authorized vaccine, should receive one additional dose of an mRNA vaccine. The minimum interval between the preceding dose and the additional dose should be 28 days.

Individuals Vaccinated with Unknown COVID-19 Vaccine Products

• If the individual indicates that they have received a previous dose(s) of a COVID-19 vaccine, but have no proof of immunization, consider whether further investigation can be done to obtain proof of immunization (e.g., contacting clinic location/health care provider or immunizer, etc.). 

• If the COVID-19 vaccine product used for a previous dose(s) remains unknown, or if written proof of immunization is provided for a vaccine whose generic or trade name is not recognized (see Appendix A), a new vaccine series should be started with a Health Canada authorized COVID-19 vaccine. 

• If the previous date of immunization was known, it would be prudent to wait for a period of at least 28 days after the administration of any other COVID-19 vaccine dose(s) before initiating a new Health Canada authorized COVID-19 vaccine series.