Current RiskUpdated: Sun Feb 1 4:05 PM
Active Weather Triggers
Short Term RiskUpdated: Sun Feb 1 4:05 PM
National Flu Activity
North East Flu Activity
Jan 18-Jan 24, 2015
Sporadically occurring influenza-like illness and positive flu tests. In addition, outbreaks of influenza-like illness in schools and workplaces, or lab confirmed flu in residential institutions (i.e., nursing homes, etc.) occurring in less than 50% of the region. Includes seasonal flu and H1N1.
- In week 3, all influenza indicators declined from the previous week, indicating that peak of the influenza season in Canada may have passed.
- A(H3N2)continues to be the most common type of influenza affecting Canadians. In both laboratory detections, hospitalizations and deaths, the majority of cases have been among seniors ≥65 years of age.
- On January 26, 2015, the first imported human case of avian influenza A (H7N9)from China was confirmed in Canada. A second case was confirmed on January 29, 2015. They are the first North Americans known to have been infected with this virus. The individuals were from British Columbia and travelled together to China. Neither required hospitalization and both have recovered. Close contacts are being monitored by appropriate public health authorities. The risk of Canadians getting sick with avian influenza A (H7N9) is very low.
- A Canadian study has examined the mid-season data on the current flu vaccine's effectiveness in Canada. The study observed little to no vaccine protection against the A(H3N2) virus, this season's most common influenza virus. The results of this study are not unexpected. As flu viruses move through the population, they can change or drift. The time it takes from the start to the finish of a vaccine production, is sometimes sufficient time for the virus to change, which is what happened this year in particular with H3N2. Evidence from the NML, however, still suggests that the vaccine continues to provide protection against the circulating A(H1N1)and B strains.
National Flu Test
Jan 18-Jan 24, 2015
Total Flu Season 2014-2015
About the Active Weather Trigger
Active weather triggers are changes in the weather that could augment health complaints. Each active weather trigger is weighted equally. The occurrence of more than one trigger increases the severity of health risk.
Temperature – a decrease of 5 degrees Celsius or more.
Humidity – an increase of 20%.
Pressure – a decrease of 0.7 kPa (kilopascal) or more.
Dewpoint – an increase of 5 degrees Celsius or more.