Theresa Tam

Theresa Tam
Tam speaking at a 2019 World Health Assembly event in Geneva
3rd Chief Public Health Officer of Canada
In office
June 26, 2017 – June 20, 2025
Prime MinisterJustin Trudeau
Mark Carney
MinisterJane Philpott
Patty Hajdu
Jean-Yves Duclos
Mark Holland
Kamal Khera
Marjorie Michel
Preceded byGregory W. Taylor
Succeeded byHoward Njoo (interim)
Personal details
Born1965 (age 60–61)
Alma materUniversity of Nottingham (MBBS)
OccupationPhysician
Chinese name
Traditional Chinese譚詠詩
Simplified Chinese谭咏诗
Transcriptions
Standard Mandarin
Hanyu PinyinTán Yǒngshī
Yue: Cantonese
Yale RomanizationTàahm Wihngsī

Theresa Tam (Chinese: 譚詠詩; born 1965) is a Canadian physician and public servant who served as the chief public health officer of Canada (CPHO), the second-in-command of the Public Health Agency of Canada (PHAC). Tam initially took the role as acting CPHO following the retirement of her predecessor, Gregory Taylor, on December 16, 2016. She was formally appointed on June 26, 2017. She stepped down as CPHO on June 20, 2025.

Tam has played a leadership role in Canada's response to public health emergencies, including SARS, H1N1, MERS, Ebola, and COVID-19. She has also worked towards eradicating polio.