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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
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.
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