Canada is experiencing a notable increase in cases of the "Norovirus," commonly known as the "winter vomiting bug," according to warnings from Canadian health officials. Experts have indicated that children and the elderly are the most vulnerable to infection and complications from this illness.

Dr. Zain Shaghla, an infectious disease specialist at St. Joseph's Hospital in Hamilton, Ontario, explained that the cases currently being reported reflect a typical seasonal pattern during the winter; however, he confirmed that the numbers indicate a rise compared to previous years.

What is Norovirus?

Norovirus is a common illness in the gastrointestinal system, and it tends to thrive during the winter and early spring when people spend more time indoors. Its symptoms include:

• Vomiting and diarrhea.

• Stomach pain and nausea.

Symptoms usually last between 24 to 72 hours, and the virus spreads through direct contact with infected individuals or by touching contaminated surfaces.

Infection cases in Canada

According to the Public Health Agency of Canada, the number of recently reported cases is high compared to the historical average between 2019 and 2023, with notable increases in provinces such as Alberta, Ontario, British Columbia, Nova Scotia, Saskatchewan, and Prince Edward Island.

In Alberta alone, the number of cases rose from 295 in 2022 to 654 in 2024, while British Columbia reported increased virus activity consistent with seasonal patterns. An outbreak of the virus has also been confirmed in two long-term care facilities in Saskatchewan.

Treatment and recommendations

There is no specific treatment for the virus, and it is recommended to replenish lost fluids using solutions containing electrolytes like "Gatorade" or "Pedialyte," especially during the vomiting phase that lasts about 24 hours.

Experts advise infected individuals to wash their hands thoroughly with soap and water and to avoid crowded places even after recovery, as a person can continue to spread the virus for a short period.

At-risk populations

Health officials warn that the elderly and young children are particularly at risk of dehydration and complications from the virus, so attention should be given to any signs of dehydration and medical help should be sought when necessary.

Infection and preventive measures

The virus is highly contagious, as it only takes exposure to a few viral particles to become infected. Dr. Shaghla emphasized the importance of personal hygiene, especially during the symptomatic period, to reduce the chances of spreading the virus to others.