This year, the onslaught of a particularly deadly strain of the flu virus may lead to a harsher flu season than usual. The strain, H3N2, showed a high level of resistance to vaccines in Australia, and is expected to continue to do so in Canada. READ ALSO: This Is Why You Can't Find A Nice Apartment In Montreal So far, this year, the vaccine has only helped prevent the flu in 10% of people inoculated. Usually, the vaccine helps protect 40-50%. The virus has already started attacking Canadians. This year, already the virus has killed five people in the Calgary area. There have also been outbreaks in Southern Ontario. As a result, hospitals are getting ready for a major increase in flu cases during the holiday season.