Did H1N1 have variants?
People remember H1N1 from the news, but there are three different variants that have been recognized in recent years: H1N1, H1N2, and H3N2. As a reminder, many types of viruses can cause very similar symptoms that are called influenza or the flu.
When was H1N1 in Ontario?
2009
In 2009, Ontario was hit with a strain of swine flu called H1N1. It triggered widespread vaccinations. More than 120 people died in the province.
How many variants of H1N1 were there?
There are 18 different hemagglutinin subtypes and 11 different neuraminidase subtypes (H1 through H18 and N1 through N11, respectively).
How many cases were there of H1N1 in Canada?
Unlike the seasonal flu common during the winter, H1N1 struck many Canadians between the spring and fall. There were two waves of infections in Canada, peaking in mid-June and early November 2009. While 8,678 people were hospitalized with confirmed cases of H1N1, probable cases brought the total to about 15,000.
How many times did H1N1 mutate?
At the time of its disappearance in 2009, the human H1N1 lineage had accumulated over 1400 point mutations (more than 10% of the genome), including approximately 330 non-synonymous changes (7.4% of all codons).
How many people died of H1N1 in Ontario?
128
Totals
| Province/Territory | Confirmed Deaths by 20 February | Increase Reported 14 – 20 February |
|---|---|---|
| Alberta | 71 | 0 |
| Saskatchewan | 15 | 0 |
| Manitoba | 11 | 0 |
| Ontario | 128 | 0 |
Did H1N1 hit Canada?
The H1N1 influenza pandemic hit Canada in the spring of 2009, and unlike SARS, there were confirmed cases in every Canadian province and territory.
How long did SARS last in Canada?
On May 16, 2003 many of these restrictions were lifted as there had been no new cases of SARS in Ontario since May 4, 2003. On May 24, health authorities in Canada informed WHO that two clusters of cases of respiratory illness in Toronto were undergoing investigation for respiratory illness, including pneumonia.
What happens when a virus mutates?
Viruses mutate to adapt to their surroundings and more effectively move from host to host. Mutations can cause viruses to better evade our immune systems, treatments and vaccines. A mutation can help the virus gain traits that better help it reproduce quickly or adhere better to the surface of human cells.
What year was SARS in Canada?
SARS emerged in China in November 2002. The disease traveled to Canada in late February 2003 when an elderly woman who acquired the disease in Hong Kong returned to her home in Toronto, Ontario, Canada’s most populous metropolitan area with approximately 4.6 million people.