Effective November 30, 2021, fully vaccinated individuals with right of entry to Canada who depart and re-enter the country within 72 hours of leaving Canada will not have to present a pre-entry molecular test. This exemption is only for trips originating in Canada taken by fully vaccinated Canadian citizens, permanent residents or individuals registered under the Indian Act, who depart and re-enter by land or by air and can demonstrate that they have been away from Canada for less than 72 hours. 

This exemption extends to accompanying children under 12, and individuals with medical contraindications to vaccination. Also effective November 30, 2021, Canada will expand the list of COVID-19 vaccines that travellers can receive to be considered fully vaccinated for the purpose of travel to Canada. The list will include Sinopharm, Sinovac and COVAXIN, matching the World Health Organization Emergency Use Listing.

The Government of Canada is also announcing that as of January 15, 2022, certain groups of travellers, who are currently exempt from entry requirements, will only be allowed to enter the country if they are fully vaccinated with one of the vaccines approved for entry into Canada. These groups include:

• individuals travelling to reunite with family (unvaccinated children under 18 years of age will retain exemption if travelling to reunite with an immediate or extended family member who is a Canadian, permanent resident, or person registered under the Indian Act);
• international students who are 18 years old and older; 
• professional and amateur athletes;
• individuals with a valid work permit, including temporary foreign workers (outside of those in agriculture and food processing); and
• essential service providers, including truck drivers.

Source: https://www.canada.ca/en/public-health/news/2021/11/government-of-canada-announces-adjustments-to-canadas-border-measures.html