Dr. Natasha Crowcroft

Applied Immunization Research and Evaluation

Photo of Dr. Natasha Crowcroft

"Working at PHO is important to me because it enables me to have an impact on the health of people in Ontario."

Areas of Expertise

  • vaccination programs and vaccine-preventable diseases
  • immunization
  • vaccination coverage
  • encephalitis
  • surveillance

Academic Degrees and Accreditations

  • Doctor of Medicine, Murray Edwards College, University of Cambridge
  • Master of Science, Department of Public Health Sciences, St. Georges Hospital Medical School, University of London
  • Bachelor of Medicine and Bachelor of Surgery, United Medical Schools of Guy’s and St. Thomas’ Hospitals, University of London

PHO Research Interests

  • Epidemiological studies and methodological development designed to answer applied public health questions for decision-makers.
  • Immunization and vaccine-preventable disease research with the objective to inform local and national policy.
  • The impact of infectious diseases and the impact interventions to prevent and control infectious diseases.

PHO Research Activities

  •  Canadian Immunization Research Network (CIRN) studies including:
    • Provincial Collaborative Network on Pertussis Vaccine Effectiveness
    • pertussis household immunology study
    • measles sero-epidemiology (iCARE).
  • PHO-funded studies including:
    • varicella susceptibility in Ontario
    • the burden and basic reproduction number of measles
    • the cost-effectiveness of public health response to measles outbreaks
    • the positive predictive value of measles IgM results in elimination settings.

Selected Publications

  1. Crowcroft NS, Johnson C, Chen C, Li Y, Marchand-Austin A, Bolotin S, et al. Under-reporting of pertussis in Ontario: a Canadian Immunization Research Network (CIRN) study Using Capture-Recapture. PLoS One. 2018;13(5):e0195984.
  2. Guerra FM, Bolotin S, Lim G, Heffernan J, Deeks SL, Li Y, Crowcroft NS. The basic reproduction number (R0) of measles: a systematic review. Lancet Infect Dis. 2017;17(12):e420-8.
  3. Parpia AS, Li Y, Chen C, Dhar B, Crowcroft NS. Encephalitis, Ontario, Canada, 2002-2013. Emerg Infect Dis. 2016;22(3):426-32.
  4. Schwartz KL, Kwong JC, Deeks SL, Campitelli MA, Jamieson FB, Marchand-Austin A, Stukel TA, Rosella L, Daneman N, Bolotin S, Drews SJ, Rilkoff H, Crowcroft NS. Effectiveness of pertussis vaccination and duration of immunity. CMAJ. 2016;188(16):E399-406.
  5. Skowronski DM, De Serres G, Crowcroft NS, Janjua NZ, Boulianne N, Hottes TS, et al; Canadian SAVOIR Team. Association between the 2008-09 seasonal influenza vaccine and pandemic H1N1 illness during spring-summer 2009: four observational studies from Canada. PLoS Med. 2010;7(4):e1000258.

View more publications by Dr. Natasha Crowcroft on PubMed.gov

Public Health Ontario Scientist Profile: Natasha Crowcroft

Dr. Natasha Crowcroft discusses what excites her about her work, the impact of her research and why she chose Public Health Ontario.

Duration: 1 min

Chat icon



Updated 12 April 2019