Ontario flu season update urges early vaccination to reduce severe illness as flu cases climb.
TORONTO — Ontario’s Chief Medical Officer of Health, Dr. Kieran Moore, is urging residents to take precautions as respiratory virus season ramps up across the province, emphasizing the importance of vaccination ahead of peak holiday gatherings.
In a statement released Monday, Dr. Moore said that although COVID-19 and RSV activity remain low, influenza cases are now rising steadily, marking the official start of flu season. With virus circulation expected to increase further through December and into the winter months, he stressed that vaccination continues to be the most effective way to prevent severe illness.
“With the holiday season fast approaching, it’s important to take all necessary precautions to keep yourself and your loved ones healthy, including by ensuring your vaccines are up to date,” Dr. Moore said in the statement.
Vaccines Now Available Across Ontario
Flu and COVID-19 vaccines are currently available to people six months and older at participating pharmacies, physician and nurse practitioner clinics, and local public health units. RSV immunization is also being offered to eligible high-risk groups, including adults 75+, pregnant women, and infants.
Dr. Moore noted that this year’s flu vaccine covers multiple circulating strains and remains the strongest defense against infection and serious complications. As influenza activity may peak as early as mid-December in parts of the province, residents are encouraged to get vaccinated as soon as possible, given that full immune protection takes approximately two weeks to develop.
High-Risk Individuals Encouraged to Plan Ahead
Those at increased risk of hospitalization or severe outcomes—such as older adults, young children, individuals with chronic conditions, and immunocompromised people—are advised to speak with their health-care provider now about testing and treatment options should they fall ill.
Simple Protective Measures Still Matter
As respiratory viruses spread more easily during colder weather and indoor gatherings, Dr. Moore reminded Ontarians to continue practising basic health measures throughout the season:
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Wash hands often
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Cover coughs and sneezes
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Clean high-touch surfaces
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Stay home when sick
These steps, he said, remain vital in reducing transmission and protecting vulnerable groups.
Ontario provides regularly updated information on vaccine clinic locations and seasonal respiratory virus guidance through its online public health resources.
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