It will usually end by april, but in some years it can linger into may. This flu season alone has sickened at least 19 million across the. In canada, the peak times for colds are at the start of school in the fall, in midwinter, and again in early spring. In birds, humans, and pigs, the virus has mutated into many strains. William schaffner, a vanderbilt university vaccine. Thirteen influenza vaccine products from seven different vaccine manufacturers will be available on the u. Flu activity peaked during the week ending december 28. Over 560 canadians have died and more than 7,400 have been hospitalized as a result of the influenza virus during the 20142015 flu season. Jan 04, 2017 influenza cases are spiking across the country and infectiousdisease experts warn the worst may be yet to come. Tmas flu fighters want you to have the latest information on the 2014 seasonal influenza. Additional laboratory testing revealed influenza ah3n2 virus infections in all cases. Flu season is coming heres how canadians can protect. Burden estimates for the 20142015 influenza season cdc.
Canada is in the midst of a rough flu season and the worst. This report summarizes influenza activity in canada during the 2012 influenza season. H3n2predominant 20142015 season, but only slightly more than the previous h1n1predominant season in 202014 figure 8, table 3. Almost all the influenza illness in canada to date this year has been caused by a family of. Influenza b, the viral strain that usually circulates toward the end of flu season. Interim estimates of 201415 vaccine effectiveness against influenza. When those viruses dominate, doctors expect a severe flu season. Government of saskatchewan is not responsible for any damage or issues that may possibly result from using translated website content. This study examined the effect of the timing of administration of oseltamivir chemoprophylaxis for the control of influenza a h3n2 outbreaks among residents in longterm care facilities ltcfs in manitoba, canada, during the 20142015 influenza season. Eurosurveillance detection of influenza ah3n2 clade 3c. Canadas sentinel physician surveillance network links genetic, antigenic, and vaccine effectiveness ve measures in an integrated platform of influenza monitoring, described here for the 202014 influenza season of resurgent ah1n1pdm09 and lateseason type b activity.
In canada, as of january 25, 2020 there have been 18,766 confirmed cases of influenza. Influenza activity started in week 472017 and returned to baseline levels in week 182018. The national season started in week 43 october 2127, 2018, peaked in week 52 december 2329, 2018 and ended in week 21 may 1925, 2019. The number and percentage of influenza a detection for the week are higher than in previous seasons, although similar to the 2014 15 season, the flu watch report states. Increase in hospital admissions for severe influenza ab. In northern and southwestern europe eueea, the activity started to increase between middecember and early january, similar to the timing of the 20162017 season but earlier than in the previous five seasons. Influenza surveillance report week of march 21, 2020. Aug 12, 2014 todays reports suggesting a particularly severe flu season could easily be overstating the case.
One of the best ways to prevent seasonal influenza is by getting the influenza vaccine each year. Canadian study finds flu vaccine working well against h1n1. Compared with the previous five influenza seasons, the 2014 2015 season was moderately severe, with overall high levels of outpatient illness, high levels of hospitalization and a relatively high percentage of deaths attributed to pneumonia and influenza. Alberta had an extended flu season this year which increased our numbers. Flu activity most commonly peaks in the united states in january or february. The 20182019 flu season may not have been as severe as the one that came before it, but it set a record of its own, the centers for disease control and prevention cdc say. June 23 to july 20, 2019 weeks 26 to 29 may 19 to june 22, 2019 weeks 21 to 25 may 12 to may 18, 2019 week 20 may 5 to may 11, 2019 week 19 april 28 2019 to may 4, 2019 week 18. For current influenza maps and charts, see public health agency of canada links, below. The estimates of hospitalizations places this season in the same range as the 2012, 2014 15, and 201617 seasons, all of which were fairly severe. Describing the magnitude of the 20142015 influenza ah3n2. Doctors warn h3n2 flu to hit canadians hard during busy. In years in which h3n2 is the predominant strain, there are more hospitalizations.
These symptoms typically begin two days after exposure to the virus and most last less than a week. While seasonal influenza flu viruses are detected yearround in the united states, flu viruses are most common during the fall and winter. This suggests that the end of the influenza season at the national level occurred in week 12 midmarch. The influenza season peaked nationally between late december 2012 and early. The figures, released by influenza specialist group say there have been more than 20,000 cases. An estimated 80,000 americans died of flu and its complications last winter. The overall burden of influenza for the 20142015 season was an estimated 30 million influenza illnesses, 14 million influenzaassociated medical visits, 591,000 influenzarelated hospitalizations, and 51,000 fluassociated deaths table. The effect of timing of oseltamivir chemoprophylaxis in.
Influenza vaccines available during the 2014 15 season. At least 1,300 people have died from the flu so far this season, according to a preliminary estimate released friday by the us centers for disease control and prevention. This manuscript describes the identification of an oseltamivir. Prioryear vaccination cut flu vaccine effects in 2014.
The peak period for the first wave was may 3109 to june 2009, and for the second wave october 2509 to november 1409. Last season s yearend estimates neared 1 million flu related hospitalizations. More information about flu activity during the 20142015 season can be found in 20142015 flu season drawing to a close, fluview, and the mmwr report update. The 201415 influenza season to date in canada has been characterised by predominant influenza ah3n2 activity. Flu season is the time of year when you are most likely to get sick from the flu. People who are at high risk of serious flu illness should take flu antiviral drugs quickly if they get sick. Sep 04, 2014 toronto gsk, canada s largest flu vaccine supplier, will not be able to fill about 30 per cent of its canadian order for the upcoming 2014 15 flu season, the company said thursday. Inf luenza activity can sometimes be predicted and even tracked geographically. Estimated influenza disease burden, by season united states, 201011 through 201718 influenza seasons. The emergence of a new and very different h1n1 virus meant that two vaccines were needed. A highdose flu vaccine is also available for adults 65 years of age and older protecting against three different flu viruses. August 26, 2018 to september 8, 2018 weeks 3536 weekly reports 20172018 season. Everyone 6 months and older get a flu vaccine each season.
Adults catch approximately 2 to 4 colds a year, and children catch even more. While influenza viruses circulate yearround, most of the time flu activity peaks between december and february, but activity can last as late as may. Toronto gsk, canada s largest flu vaccine supplier, will not be able to fill about 30 per cent of its canadian order for the upcoming 2014 15 flu season. In the 201415 influenza season, universal influenza vaccination of healthy individuals from 6 months of age was recommended by naci in. Influenza update 365 april 2020 update number 365, based on data up to 29 march 2020. In the 20192020 influenza season all regulardose flu shots and all recombinant vaccine in the united states were quadrivalent. July 22, 2018 to august 25, 2018 weeks 3034 june 24, 2018 to july 21, 2018 weeks 2629 may 20, 2018 to june 23, 2018 weeks 2125 may, 2018 to may 19, 2018 week 20 may 6, 2018 to may 12, 2018 week 19 april 29, 2018 to may 5, 2018 week 18. Fluwatch reports with information on flu activity in canada are posted every friday.
Summary fluwatch reports with information on flu activity in canada for the previous years flu. The flu influenza is a contagious virus that anyone can get. An increase in hospital admissions for influenza occurred during the summer of 2015 at an acute care facility in vancouver, british columbia, canada. Oct 22, 2018 influenza activity started in week 472017 and returned to baseline levels in week 182018. Flu activity peaked during the week ending december 28, 20 for the 20 2014 season and began a downward trend in early january. Aug 01, 2018 prior to the 20142015 influenza season, only 18 cumulative cases of influenzaassociated parotitis were reported during the 19751976, 19841985, 20042005, and 20072008 influenza seasons in the united states, canada, chile, and spain 410. Influenza activity can sometimes be predicted and even tracked geographically. The influenza ah3n2 virus that was the predominant circulating strain was antigenically distinct from the 2014 2015 northern hemisphere.
The 2009 flu pandemic in canada was part of an epidemic in 2009 of a new strain of influenza a virus subtype h1n1 causing what has been commonly called swine flu. If you think that you might have the flu, you can call telehealth at 18667970000 to talk to a registered nurse 24 hours a day, 7 days a week. Starting with the 20182019 influenza season most of the regulardose eggbased flu shots and all of the recombinant and cellgrown flu vaccine in the united states were quadrivalent. Past influenza seasonal data alberta health services.
The 20172018 flu season was one of the deadliest in decades according to the cdc. The frequency of outpatient visits to doctors for influenza like illness ili went above the national baseline the week ending november 22, 2014 and remained elevated for 20 consecutive weeks, making the season longer than average and the longest in more than a decade. The 2014 15 flu season was not only tough because h3n2 was dominant with a. June 23 to july 20, 2019 weeks 26 to 29 may 19 to june 22, 2019 weeks 21 to 25 may 12 to may 18, 2019 week 20 may 5 to may 11. During the 201415 influenza season, 168 respiratory samples from students with influenzalike illness ili at a college in new york, usa, were positive for human adenovirus hadv. While flu season officially doesnt start in canada until november which goes into april of 2018, simor adds some public health officials in toronto, for example. As of january 18, 2014, 95% of cumulative influenza virus detections across canada were influenza a. Influenza vaccines available during the 201415 season. Why this years flu season is off to a slow, nearly nonexistent start flu activity began earlier than usual in 2014 15 and resulted in one of the most severe influenza. The percentage of tests positive for influenza this week 0. The numbers referenced from the report below uses data up to march 31, 2019. Weekly influenza surveillance reports for 201920 season.
Influenza cases are spiking across the country and infectiousdisease experts warn the worst may be yet to come. Sep 26, 2018 the 20172018 flu season was one of the deadliest in decades according to the cdc. The purpose of this guidance document is to inform physicians and other health care practitioners of an increased risk of influenza outbreaks in longterm care facilities ltcf during the 2014 2015 influenza season in canada, and to provide recommendations for adjustment to ltcf outbreak control measures on the basis of documented vaccine mismatch. Influenza activity united states, 201415 season and composition of the 201516 influenza vaccine. Centers for disease control and prevention and other groups were published dec. Access all weekly influenza surveillance reports for the 20192020 season, from the public health agency of canada. The exact timing and duration of flu seasons can vary, but influenza activity often begins to increase in october. But there are several things you can do to avoid catching it, or spreading it to others. Canadas flu season has been a rough ride and its not over yet. Cnn reports that fauci says the 20192020 flu season is on track to be as severe as the 20172018 season, which was the deadliest in at least a decade. Overall, very low levels of influenza acitivity are being reported across canada. The s eason occurs during the cold half of the year in each h emisphere.
As usual, components of the seasonal flu vaccine were decided. New study to explore why 201415 flu shot was a bust. The flu has already killed 10,000 across us as world frets. Canadas flu season has been a rough ride and its not. Flu seas on is an annually recurring time period characterized by the prevalence of outbreaks of influenza flu. Dont believe everything you read about flu deaths the cdcs decision to play up flu deaths dates back a decade, when it realized the public wasnt following its advice on the flu vaccine.
The 20192020 influenza season began on august 25, 2019. For the 202014 season, influenzalikeillness ili in the united states began increasing in midnovember, and toward the end of december, ili was high across most of the country. Nov 19, 2018 during the 20162017 influenza season, the cdc estimates that flu vaccine prevented an estimated 5. Information in this report is categorized by influenza transmission zones, which are geographical groups of countries, areas or territories with similar influenza transmission patterns.
Following treatment with oseltamivir, neuraminidase na gene sequencing indicated the presence of an r292k mutation. The 20142015 influenza season in canada and north america had the highest morbidity and mortality since the 20092010 pandemic season1,2. This is the final influenza surveillance report for the 20192020 season. Influenzaassociated parotitis during the 20142015 influenza. Fluwatch is canada s national surveillance system that monitors the spread of flu and flu like illnesses. Final report for 201819 influenza season as of march 31, 2019. Influenza season 202014 national collaborating centre for. Oseltamivir resistance in an influenza a h3n2 virus. The high number of outbreaks last season was likely due to the poor effectiveness of the 20142015 influenza vaccine against the predominant circulating h3n2 strain. What will the rest of the 20192020 flu season be like. In the united states, flu season occurs in the fall and winter. Participants were recruited prior to the start of each influenza season from 9 canadian hospitals located in toronto, ontario 20102011 to 202014, hamilton, ontario 20112012 to 202014, and halifax, nova scotia 20112012 to 202014.
Seasonal influenza is the annual influenza that affects people in canada during the winter, typically between november and april. The number of positive influenza laboratory tests divided by the total number of tests performed. Flu season in the us, which runs from october through may, claims tens of thousands of lives every year. Even so, the 20192020 flu season has been particularly unusual. The purpose of this guidance document is to inform physicians and other health care practitioners of an increased risk of influenza outbreaks in longterm care facilities ltcf during the 20142015 influenza season in canada, and to provide recommendations for adjustment to ltcf outbreak control measures on the basis of documented vaccine mismatch. What you need to know as flu season peaks in canada ctv news. Ontario, the median hcw influenza immunization rate for hospitals peaked at 60. Investigation identified 25 patients with recent history of cruise ship travel to alaska. Canada is in the midst of a rough flu season and the worst is. The 201819 influenza season in canada was longer than the previous five seasons and was characterized by two waves of influenza a activity and very little influenza b circulation. Influenza a virus subtype h3n2 ah3n2 is a subtype of viruses that causes influenza flu. Flu season deaths top 80,000 last year, cdc says cnn. Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus. Seasonal flu kills 291,000 to 646,000 people worldwide each year, according to a new estimate thats higher than the previous one of 250,000 to 500,000 deaths a year.
Canadian researchers today released a preliminary estimate that this years influenza vaccine reduces the risk of infection from the 2009 pandemic h1n1 ph1n1 virus by 74%apparent good news in a season when that strain is by far the most common one in north america. In week 14, the percentage of tests positive for influenza remained below 5%. Access all weekly influenza surveillance reports for 201415 season. For the 20 2014 season, influenza likeillness ili in the united states began increasing in midnovember, and toward the end of december, ili was high across most of the country. Flu season is an annually recurring time period characterized by the prevalence of outbreaks of influenza flu. So far, flu activity in canada resembles the 2014 15 season. Mar 16, 2014 influenza affects up to 15% of adults and 30% of children each flu season and early indications suggest we could be facing a severe season. To understand the epidemic resurgence of influenza due to the 2009 pandemic influenza ah1n1 strain ah1n1pdm09 during the 202014 influenza season, we compared agerelated crosssectional estimates of seroprotection before the pandemic during 2009 and after the pandemic during 2010 and 20 to subsequent surveillancebased. Jan 05, 2015 what you need to know as flu season peaks in canada. The agency has not previously provided in season estimates. Detection and genetic characterization of adenovirus type 14. The 20142015 influenza season in canada and north america had the highest morbidity and mortality since the 20092010 pandemic season. The 2014 seasonal influenza vaccination is available.
Which healthcare workers work with acute respiratory illness. In ontario, canadas most populous province, influenza season traditionally peaks in late decemberearly january during periods when influenza a activity. While the beginning of major flu activity in each season varies by location, in any. Doctors warn h3n2 flu to hit canadians hard during busy holiday season. The season occurs during the cold half of the year in each hemisphere. Integrated sentinel surveillance linking genetic, antigenic. Seasonal influenza report, 20142015 open government. The 202014 season saw another spike in cases across the country.
The season was a severe one for people 65 years and older. Flu experts knew it was a very bad season, but at least one found size of the estimate surprising. Among subtyped influenza a viruses, 97% were a h1n1. You can get influenza at any time, even in summer, but it is most common in the colder months. Influenza is a respiratory infection caused by influenza viruses of the family orthomyxoviridae. So far, flu activity in canada resembles the 2014 15 season, a brutal year. The flu season began in december and the public health agency of canada says more than 15,500 cases of laboratoryconfirmed influenza had been reported by jan.
While you are likely receiving a great deal of information on influenza, the flu fighters cull through the national and state guidance and data for you, and highlight key messages and important guidance for your patients. Pre and postpandemic estimates of 2009 pandemic influenza a. In the 2014 15 influenza season, when seasonal flu vaccines performed unusually poorly overall, people who had not been vaccinated the previous year were the ones most likely to benefit from the vaccine, whereas those who were vaccinated 2 years in a row did not, a new study from canada s influenza surveillance network suggests. Influenza affects up to 15% of adults and 30% of children each flu season and early indications suggest we could be facing a severe season. Flu vaccine supplier gsk warns of 201415 shortage ctv news. Almost all the influenza illness in canada to date this year has been caused by a family of influenza a viruses called h3n2. The following table highlights the differences between influenza and the common cold. In general, flu season can start anytime in late fall, peak in midtolate winter usually january or february, and continue through early spring.
333 1568 1247 1285 1607 89 788 1281 1391 71 1197 830 169 778 1417 580 1324 855 115 1139 1497 127 1274 101 117 362 469 1172 367 465 621 1022 883 1291 1269 198 1284 1191 34