An airline staff member assists a traveler at the departures hall of Vancouver International Airport in Richmond, British Columbia, Canada, on Oct. 30, 2021. Beginning Saturday, travelers who are 12 years of age or older need to provide proof that they have been fully vaccinated against COVID-19 while taking their trips within Canada or overseas. (Photo by Liang Sen/Xinhua)
A mandatory vaccination sign for travelers is seen at Toronto Pearson International Airport in Mississauga, Ontario, Canada, on Oct. 30, 2021. Beginning Saturday, travelers who are 12 years of age or older need to provide proof that they have been fully vaccinated against COVID-19 while taking their trips within Canada or overseas. (Photo by Zou Zheng/Xinhua)
Travelers wearing face masks line up to check in at Toronto Pearson International Airport in Mississauga, Ontario, Canada, on Oct. 30, 2021. Beginning Saturday, travelers who are 12 years of age or older need to provide proof that they have been fully vaccinated against COVID-19 while taking their trips within Canada or overseas. (Photo by Zou Zheng/Xinhua)
A staff member wearing a face mask helps a traveler check required documents at Toronto Pearson International Airport in Mississauga, Ontario, Canada, on Oct. 30, 2021. Beginning Saturday, travelers who are 12 years of age or older need to provide proof that they have been fully vaccinated against COVID-19 while taking their trips within Canada or overseas. (Photo by Zou Zheng/Xinhua)
Passengers wearing face masks line up to board a train at Union Station in Toronto, Ontario, Canada, on Oct. 30, 2021. Beginning Saturday, travelers who are 12 years of age or older need to provide proof that they have been fully vaccinated against COVID-19 while taking their trips within Canada or overseas. (Photo by Zou Zheng/Xinhua)
