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A-Z Health Topics lists public health information that's not found in other areas of our website. You'll find a wide variety of topics here, most of which include links to other websites where you can find even more information.

If you think we're missing a topic, you can email us to suggest one by going to our Contact Us page.

Health Topics

A (9) | B (4) | C (10) | D (1) | E (5) | F (2) | G (3) | H (15) | I (5) | L (6) | M (9) | N (1) | O (1) | P (5) | R (4) | S (7) | T (5) | U (1) | V (3) | W (2) | Y (2) | Z (1)
An alphabetical listing of Health Topics.
Titlesort ascending
Meningitis (MenACYW) vaccine

People between 2 and 55 years old can have the meningitis vaccine.

Meningitis

Meningitis is a disease caused by the inflammation of the protective membranes covering the brain and spinal cord known as the meninges. Meningitis may develop in response to a number of causes, usually bacteria or viruses, but can also be caused by physical injury, cancer, or certain drugs.

Measles

Measles is a virus that’s very contagious. Most people recover from infection, but measles can have serious complications and lead to long-term health problems.

Mandatory Blood Testing Act

The Mandatory Blood Testing Act reduces the time it takes to get results of certain blood tests.

Maladie méningococcique

Garder la vaccination de votre enfant à jour permet de le protéger contre bien des types de la maladie méningococcique.

L’amibiase

L’amibiase est une infection intestinale causée par un parasite qui vit dans les matières fécales des personnes infectées.

Listeriosis

Listeria is a bacteria that can cause a rare but serious illness called listeriosis. Those who are pregnant, the elderly, and those with a weakened immune system have a higher risk of becoming seriously ill.

Legionella

Legionella are bacteria that live in water that can cause two types of illness in humans: Legionnaires’ disease and Pontiac fever.

Lead in Schools, Private Schools and Child Care Centres

Ministry of Environment and Climate Change (MOECC) under the Ontario Regulation 243/07 requires all schools, private schools and child care centres to sample and test drinking water to measure the concentration of lead against the provincial drinking water guidelines for lead.

Lead in Drinking Water

Lead is a toxic metal that is found naturally in the air, soil, and water. It is also used in mining, manufacturing, and burning of fossil fuels. The amount of lead Canadians are exposed to has decreased since the 1970s, mainly due to the removal of lead in gasoline, paint, and solder in food cans (Government of Canada, 2013).

La salmonellose

Qu'est-ce que la salmonellose? La salmonellose est une taxi-infection alimentaire causée par la germe Salmonella.

Invasive Pneumococcal Disease

Invasive pneumococcal disease is a sudden and serious illness caused by a bacteria called streptococcus pneumonia.

Invasive Meningococcal Disease

Invasive meningococcal disease (IMD) is a serious infection caused by the bacteria, Neisseria meningitidis.  Up to 10% of the population carry the bacteria at the back of their throat or nose without ever getting sick.

Influenza (Flu)

Influenza (the flu) is a respiratory infection caused by the influenza virus. The flu season (when most people get sick with the flu) often begins in late fall.

Indoor Tanning

Tanning can cause cancer. Sun lamps or tanning beds, just like the sun, give off ultraviolet radiation (UVR), a cancer-causing substance that causes harm to the eyes, early aging of the skin, wrinkling, and skin cancer.

Impetigo

Impetigo is a highly contagious skin infection caused by bacteria called group A streptococcal (strep) or Staphylococcus aureus (staph). The infection happens when the bacteria get into scrapes and insect bites.

Hydrogen Sulfide

Hydrogen sulfide (H 2S) is a flammable (only at very high concentrations), colorless gas that smells like rotten eggs.

Human Papillomavirus (HPV) Vaccine

Females aged 9 to 45 years old and males aged 9 to 26 years old should get the HPV vaccine. The provincial government is funding the voluntary HPV vaccination program for all grade 7 males and females in Ontario. This means that all males and females starting in grade 7 can get the vaccine free from the Health Unit.

Human Papillomavirus (HPV)

HPV is a very common virus that can cause many types of cancers.

HIV (AIDS)

HIV (Human Immunodeficiency Virus) is the virus that causes Acquired Immune Deficiency Syndrome (AIDS).

Hepatitis C

Hepatitis C is a virus that you can get from contact with an infected person’s blood.

Hepatitis B Vaccine

Anyone of any age can get the hepatitis B vaccine. People of certain high risk categories are able to receive the provincially funded vaccine through our Health Unit.

Hepatitis B Immunization Program for Grade 7 Students

Anyone of any age can get the hepatitis B vaccine. People of certain high risk categories are able to receive the provincially funded vaccine through our Health Unit.

Hepatitis B

Hepatitis B is a virus that can permanently damage your liver and is a leading cause of liver cancer. There is no cure for hepatitis B, and it can sometimes lead to death.

Hepatitis A

Hepatitis A (Hep A) is an infection of the liver, caused by the hepatitis A virus.

Hépatite A

L’hépatite A est une infection du foie causée par un virus. La maladie est généralement mineure chez les enfants, mais peut être plus grave chez les adultes.

Heat Illness

For most people, heat-related illnesses happen when temperatures are high for a number of days (particularly if the night time temperatures do not drop), or if the humidity is high. While the health risks related to heat are higher for certain groups (such as seniors, young children, people taking certain medications and people with chronic conditions), everyone is potentially at risk. Fortunately, most heat-related illnesses can be prevented or treated if you are aware of the risks, signs and symptoms.

Head Lice

If your child comes home with head lice, you may have a lot of questions.

Handwashing Hand Hygiene is the single most important way to control the spread of infection. View the list of steps on how to properly wash and sanitize your hands.
Hand, Foot, and Mouth Disease

Hand, foot, and mouth disease is a common viral illness that usually affects infants and children younger than 5 years, but it can occur at any age.

Haemophilus Influenzae Type b (Hib)

Haemophilus Influenzae (Hi) is caused by a bacterial infection. There are many types or “strains” of it. The sickness can be mild or very serious. If the infection gets into the bloodstream, brain, or other areas where it’s usually not found, it can cause severe infection.

Grippe

Qu'est-ce que la grippe? La grippe est une infection respiratoire d'origine virale.

Gonorrhea

Gonorrhea is a sexually transmitted bacteria that is spread by sexual contact with an infected person.

Giardia

Giardia is a parasite that causes an infection in the intestinal track. Symptoms usually start 3 to 25 days after being exposed to the parasite.

Flooding

Floods are a common and widespread natural hazard across Canada, causing extensive damage to property and loss of life. Floods can result from heavy rainfall, sewer backups, severe storms, breaking dams, broken water mains, and thawing of snow and ice. Some floods develop slowly, sometimes over a period of days or weeks. However, flash flooding usually occurs with little or no advance warning.

Fifth Disease

Fifth disease is caused by the virus Parvovirus B19. Symptoms may begin 4 to 20 days after you are exposed to someone who is infected. It's most contagious before the development of the rash.