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September 12, 2023, Ottawa, ON, CAN: Matthew Tunis, Executive Secretary at the National Advisory Committee on Immunization, speaks during a news conference on COVID-19 vaccines and other public health concerns, in Ottawa, on Tuesday, Sept. 12, 2023. Ottawa CAN - ZUMAc35_ 20230912_zaf_c35_018 Copyright: xJustinxTangx

September 12, 2023, Ottawa, ON, CAN: Chief Public Health Officer of Canada Dr. Theresa Tam speaks during a news conference on COVID-19 vaccines and other public health concerns, in Ottawa, on Tuesday, Sept. 12, 2023. From left: Dr. Supriya Sharma, Chief Medical Advisor at Health Canada, Dr. Marc Berthiaume, Director at Health Canada s Bureau of Medical Sciences, Chief Public Health Officer of Canada Dr. Theresa Tam, Deputy Chief Public Health Officer Dr. Howard Njoo, and Dr. Matthew Tunis, Executive Secretary at the National Advisory Committee on Immunization. Ottawa CAN - ZUMAc35_ 20230912_zaf_c35_016 Copyright: xJustinxTangx