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PHO Grand Rounds: Vaccines work. But how well? Reflections on methods for assessing vaccine effectiveness
Tuesday, September 13, 2016 12:00 pm to 01:00 pm
Venue: 661 University Ave, 17th Floor, Toronto, ON M5G 1M1 Boardroom 17-53
Infectious Diseases; Learning and development; Research and Collaboration; Emergency Preparedness; Family Health
City: Toronto
Type: PHO Grand Rounds
Format: In Person; Teleconference; Webinar
​Note: This is an open invitation, and may be forwarded to interested parties.

Vaccines are typically very effective but rarely provide 100% protection from disease. Understanding how well vaccines work matters to a wide range of professionals, from clinicians advising patients through to basic researchers designing better vaccines. It is also important to the public; debate about the value of influenza vaccines shows that how effectiveness is communicated is important for public confidence. Vaccine effectiveness is generally expressed as a simple percentage, but a single value may not apply to every possible outcome, for everyone, or for all time. This presentation will consider the implications of different conceptual models and methods for measuring vaccine effectiveness.

Presenter: Dr. Natasha S. Crowcroft

Natasha Crowcroft has been in public health practice for more than 20 years, in several countries. She has published nearly 200 articles, worked with WHO and PAHO, and was a member of the Canadian National Advisory Committee on Immunization (NACI) from 2008-2013. She received her medical qualifications and Masters of Science from the University of London and a Bachelor of Arts and Doctorate in Medicine (medical PhD) from the University of Cambridge.​

PHO Grand Rounds are also approved by Council of Professional Experience for professional development hours (PDHs) for members of the Canadian Institute of Public Health Inspectors (CIPHI). For more information, contact 


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Public Health Ontario is committed to complying with the Accessibility for Ontarians with Disabilities Act (AODA). 
If you require accommodations to participate in this event, please contact 647-260-7100 or events@oahpp.​​

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