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Dr. David Williams

Chief medical officer of health for Ontario

Dr. David Williams, BSc., MD, MHSc, FRCPS

Dr. David Williams is currently the chief medical officer of health for the province of Ontario. Dr. Williams was the medical officer of health for the Thunder Bay District Board of Health from October 2011 to June 30, 2015. Prior to that, Dr. Williams held the position of associate chief medical officer of health, Infectious Disease and Environmental Health Branch director at the Ministry of Health and Long-Term Care from 2005 to 2011. During this time he was also the acting chief medical officer of health for Ontario from November 2007 to June of 2009. Prior to working at the province, Dr. Williams was the medical officer of health and CEO for the Thunder Bay District Health Unit from 1991 to 2005.


Dr. Williams is a four-time graduate of the University of Toronto, receiving his BSc., MD, Masters in Community Health and Epidemiology (MHSc) and Fellowships in Community Medicine/Public Health and Preventive Medicine (FRCPS).


Prior to entering public health, Dr. Williams practiced hospital-based clinical practice as a GP and GP anaesthetist at the Sioux Lookout Zone Hospital and also in International Health at the United Mission to Nepal Mission Hospital, Tansen Nepal.

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Seniors Need To Take Special Care During Flu Season

It has been recognized for many years that people 65 years and older are at greater risk of serious complications from the flu compared with young, healthy adults because our immune defenses become weaker with age. While flu seasons can vary in severity, during most seasons, people 65 years and older bear the greatest burden of severe flu disease.
11/17/2016 03:52 EST
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Four Facts About Vaccines And Your Child

We live in a province with a publicly funded vaccination program, however, the threat posed by vaccine preventable diseases is still with us, as we have seen in recent outbreaks of measles, mumps and pertussis (whooping cough). That's why getting vaccinated is important.
01/12/2016 09:25 EST