Toronto hosts superhero-themed mass vaccination event(1/6)

Girls pose for photos with their COVID-19 vaccination stickers after being vaccinated at a vaccination site in Toronto, Canada, on Dec. 12, 2021. The City of Toronto on Sunday hosted a superhero-themed mass vaccination event as Toronto Kids Vaccine Day to vaccinate up to 2,000 children aged five to 11 against COVID-19. (Photo: Xinhua/Zou Zheng)

A vaccinator wearing a face mask and a face shield administers the COVID-19 vaccine to a child at a vaccination site in Toronto, Canada, on Dec. 12, 2021. The City of Toronto on Sunday hosted a superhero-themed mass vaccination event as Toronto Kids Vaccine Day to vaccinate up to 2,000 children aged five to 11 against COVID-19. (Photo: Xinhua/Zou Zheng)

A vaccinator wearing a face mask and a face shield prepares to administer the COVID-19 vaccine to a child at a vaccination site in Toronto, Canada, on Dec. 12, 2021. The City of Toronto on Sunday hosted a superhero-themed mass vaccination event as Toronto Kids Vaccine Day to vaccinate up to 2,000 children aged five to 11 against COVID-19. (Photo: Xinhua/Zou Zheng)

Children receive the COVID-19 vaccine at a vaccination site in Toronto, Canada, on Dec. 12, 2021. The City of Toronto on Sunday hosted a superhero-themed mass vaccination event as Toronto Kids Vaccine Day to vaccinate up to 2,000 children aged five to 11 against COVID-19. (Photo: Xinhua/Zou Zheng)

Children receive the COVID-19 vaccine at a vaccination site in Toronto, Canada, on Dec. 12, 2021. The City of Toronto on Sunday hosted a superhero-themed mass vaccination event as Toronto Kids Vaccine Day to vaccinate up to 2,000 children aged five to 11 against COVID-19. (Photo: Xinhua/Zou Zheng)

A boy wearing a face mask poses for photos with a COVID-19 vaccination "passport" after being vaccinated outside a vaccination site in Toronto, Canada, on Dec. 12, 2021. The City of Toronto on Sunday hosted a superhero-themed mass vaccination event as Toronto Kids Vaccine Day to vaccinate up to 2,000 children aged five to 11 against COVID-19. (Photo: Xinhua/Zou Zheng)