Ontario’s Chief Medical Officer of Health is urging residents to get vaccinated against respiratory viruses as flu cases increase heading into the holiday season.
Dr. Kieran Moore issued a statement on Dec. 9, 2025, noting that while COVID-19 and RSV activity remain low in the province, flu season has arrived and cases are steadily increasing.
“Getting vaccinated reduces your risk of catching the flu and, most importantly, lowers the chance of severe illness, hospitalization and serious complications,” said Moore.
Vaccines available now
Flu and COVID-19 shots are available across Ontario for people six months and older at participating pharmacies, doctor and nurse practitioner offices, and public health units. RSV immunization is available for eligible groups, including adults aged 75 and older, infants and pregnant women.
Moore said influenza activity is expected to peak as early as mid-December in some regions. The vaccine takes about two weeks to reach full effectiveness.
High-risk groups encouraged to act
Those at higher risk of severe illness are especially encouraged to get vaccinated early. Moore recommended that high-risk individuals and their families talk to their health care provider now to plan for testing and treatment.
Basic prevention measures
Moore reminded Ontarians to follow basic prevention steps during the holiday season: wash hands, cover coughs and sneezes, clean shared surfaces regularly, and stay home when sick.
Respiratory illness season typically runs from fall through winter months, when colder weather and indoor gatherings make it easier for viruses to spread.
