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For more information on each vaccine, including how to get vaccinated, visit the dedicated web pages listed below. Information for 2025/2026 will be posted on these pages when it is available.
COVID-19
Flu
RSV (protection for infants and high-risk older adults)
Find a pharmacy - Use the…
More information on the 2025/2026 flu shot season will be posted here when it is available.
For more information about Ontario's campaigns:
FLU - To learn more, visit Ontario.ca/flu
COVID-19 - To learn more, visit Ontario.ca/COVID-19
PLEASE NOTE: This page provides up to date information about active outbreaks within the city of Thunder Bay and the District communities.
An outbreak is declared in a facility when there is a higher than normal rate of respiratory or gastrointestinal symptoms among the residents. The public…
Updates
Guidance for 2025/2026 respiratory illness season will be updated in the fall and will be available on these dedicated pages:
Influenza
COVID-19
RSV
In this section, health care providers can access important information about public health as it pertains to their…
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Date
Contents
July 29, 2025
Adverse Event Following Immunization (AEFI) – Updates to reporting form and fact sheet
World Hepatitis Day 2025
Save the Date: Harm Reduction Conference 2025
WEBINAR RECORDING: Understanding brain…
What is Hand, Foot and Mouth Disease?
Hand, foot and mouth disease is an infection caused by the coxsackie virus. The infection can occur at any age, but it is most likely to affect young children. It usually occurs in the summer and fall. This infection is not related to the virus that causes…
Ontario Tanning Bed Legislation-Information for Tanning Bed Operators
Effective May 1, 2014, it is illegal to sell, offer for sale or provide tanning services to anyone under 18 years of age in Ontario. Visit www.ontario.ca/uvrsmart for more information. Below are the most common…
What is Amebiasis?
Amebiasis is an intestinal illness caused by a microscopic parasite, called Entamoeba histolytica (ent-a-ME-ba his-to-LI-ti-ka). Amebiasis occurs worldwide. Although, anyone can acquire this illness, it is most common in people who live in developing countries…
What is Anthrax?
Anthrax is an acute infectious disease caused by the spore-forming bacterium Bacillus anthracis. It is primarily a disease of sheep, goats, cattle and swine, but it can also infect humans. Symptoms of the disease usually occur within 7 days after exposure and will vary…
What is Botulism?
Botulism is a rare but serious paralytic illness caused by a nerve toxin produced by the bacterium Clostridium botulinum (klos-trih-dee-um bot-u-li-num). There are four kinds of botulism which are food-borne botulism, wound botulism, infant botulism and adult…
What is Brucellosis?
Brucellosis, or Undulant Fever, is a rare infectious disease caused by Brucella bacteria. These bacteria are passed, and cause disease, primarily among animals. Various Brucella bacteria affect sheep, goats, cattle, deer, elk, pigs, dogs, and several other animals.
Humans…
What is Campylobacteriosis?
Campylobacteriosis (cam·py·lo·bac·teer-ee-o-sis) is a disease caused by bacteria called Campylobacter. Campylobacter infect the intestinal tract and sometimes the blood. There are 16 species and six subspecies assigned to the genus Campylobacter, of which the most…
What is Chickenpox?
Chickenpox is caused by the varicella-zoster virus. About 90 percent of chickenpox cases occur before the child becomes 12 years of age. There is a vaccine.
What are the symptoms of Chickenpox?
Children with chickenpox will feel flu-like symptoms such as fatigue…
What is Cholera?
Cholera is a diarrheal disease caused by eating or drinking food or water contaminated with the bacterium Vibrio cholerae.
How common is Cholera?
Cholera is not a common disease in Canada. In Ontario, an average of one case per year is reported and all cases have…
What is Clostridium difficile (C. diff)?
C. diff is one of the many germs (bacteria) that can be found in stool (a bowel movement). C. diff disease occurs when antibiotics kill your good bowel bacteria and allow the C. diff to grow. When C. diff grows, it produces substances (toxins). These toxins…