With the 20162017 flu season over, the cdc has finished evaluating the effectiveness of last years vaccine. The 20172018 flu season was the most deadly in the past decade with a cdc estimate of 61,000 deaths. Another tough flu season hits canada, affecting children. However, it could equal or surpass the 20182019 seasons. For the past several years, cdc has used a mathematical model to estimate the numbers of influenza illnesses, medical visits, hospitalizations, and deaths. According to new estimates from the centers for disease control and. The 201920 influenza season ended abruptly in week 12. In fact, the spikes in the number of cases are close to mimicking the monstrous 201718 flu season, which was one of the worst in almost ten years, according to the end of decembers weekly u. Jan 04, 2017 everything you need to know about this years flu season. Nov 19, 2018 during the 2016 2017 influenza season, the cdc estimates that flu vaccine prevented an estimated 5. Flu season deaths top 80,000 last year, cdc says cnn. Jan 11, 2018 the flu season in canada is shaping up to be a nasty one as emergency rooms across the country become overcrowded with sick patients.
The majority of people hit by the flu this season will recover. As the flu season comes to an end, were beginning to understand why it was so bad. How does the 20182019 flu season compare to last years. The 2017 2018 united states flu season lasted from late 2017 through early 2018. Nov 02, 2017 australia has recorded 221,853 flu infections so far in 2017, more than any other year. A highdose flu vaccine is also available for adults 65 years of age and older protecting against three different flu viruses.
Patients 1 year old and older presenting at study sites in alberta, british columbia, ontario and quebec were included in the study. While influenza viruses circulate yearround, most of the time flu activity peaks between december and february, but activity can last as late as may. The flusurvnet data for 2018 totaled nearly 15,000 inhospital influenzaassociated deaths. Flu activity most commonly peaks in the united states between december and march. This years flu season is shaping up to be possibly less severe than the 20172018 season, when 61,000 deaths were linked to the virus. The 20192020 influenza season began on august 25, 2019. Oct 22, 2018 influenza activity started in week 472017 and returned to baseline levels in week 182018. Flu season may be especially bad for 2017 and 2018 time. While it might seem pointless to research an old vaccine, this could greatly help this years flu shot. Sep 26, 2018 the 2017 2018 flu season was one of the deadliest in decades according to the cdc. In the years since the cdc implemented their newest, most accurate tracking system, 20172018 is already the most widespread and intense season yet.
For the 20162017 season, influenzalikeillness ili in the united states went above baseline the week ending december 17, 2016 and remained elevated as of midmarch. It will usually end by april, but in some years it can linger into may. This years flu season is shaping up to be possibly less severe than the 2017 2018 season, when 61,000 deaths were linked to the virus. Heres why canada may be in for a miserable 201718 flu season. In fact, the spikes in the number of cases are close to mimicking the monstrous 2017 18 flu season, which was one of the worst in almost ten years, according to the end of decembers weekly u. However, it could equal or surpass the 20182019 season s. Flu season is an annually recurring time period characterized by the prevalence of outbreaks of influenza flu. What you need to know before flu season hits in canada cbc news. Flu season is the time of year when you are most likely to get sick from the flu. The previous high for a regular flu season, based on. The number of children admitted to hospital for flu so far this season is. April 16 to april 22, 2017 week 16 april 9 to april 15, 2017 week 15 april 2 to april 8, 2017 week 14 march 26 to april 1, 2017 week march 19 to march 25, 2017 week 12 march 12 to march 18.
First flu deaths of season serve as early reminder of the. Jun 20, 2019 t he 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. Oct 03, 2017 a miserable flu season may be in the works as influenza arrives on canadas doorstep, experts are warning. In canada, as of january 25, 2020 there have been 18,766 confirmed cases of influenza. These are the deadliest years for the flu in history.
The flu is affecting people over 65 years of age the most and there have been 54 reported flu deaths in canada this season, the fluwatch report said. Mar 05, 2020 an estimated 32 million americans have come down with influenza since this years flu season began in late september, resulting in about 18,000 deaths, according to the centers for disease. Across canada, influenza ah3n2 accounted for the majority of laboratoryconfirmed cases. What you need to know before flu season hits in canada cbc. The methods used to calculate the estimates have been described previously. Flu season starting early could signal an extra bad year. April 2 to april 8, 2017 week 14 march 26 to april 1, 2017 week march 19 to march 25, 2017 week 12 march 12 to march 18, 2017 week 11 march 5 to march 11, 2017 week 10 february 26 to march 4, 2017 week 9 february 19 to february 25, 2017 week 8 february 12 to february 18, 2017 week 7 february 5 to february 11, 2017 week 6. The season occurs during the cold half of the year in each hemisphere.
Early season cocirculation of influenza ah3n2 and byamagata. Last year, there were far fewer cases, with 8,976 reported by the end of the first week of january 2017. Since fluassociated deaths in children became a nationally notifiable condition in 2004, the total number of fluassociated deaths among children during one season has ranged from 37 during the 20112012. Sep 27, 2018 influenza killed about 80,000 people in the 2017 2018 season, according to figures released by the centers for disease control and prevention. The canadian flu season was also defined by early influenza bvictoria activity, but the flu vaccine has proved more effective so far, according to a eurosurveillance study. December 10, 2017 to december 16, 2017 week 50 december 3, 2017 to december 9, 2017 week 49 november 26 to december 2, 2017 week 48 november 19 to november 25, 2017 week 47 november 12 to november 18, 2017 week 46 november 5 to november 11, 2017 week 45 october 28 to november 4, 2017 week 44 october 22 to october 28, 2017 week 43. Another tough flu season hits canada, affecting children harder.
High rates of flu occurred all over the country simultaneously, in contrast to most seasons of the past decade, when certain states would peak with flu activity while others remained relatively quiet see chart. Eurosurveillance early season cocirculation of influenza a. You could have the flu shortly before christmas, labs across the country started to see more positive flu tests. The 2017 2018 flu season was the most deadly in the past decade with a cdc estimate of 61,000 deaths. In all states except hawaii and oregon, the distribution of influenza was indicated as widespread, including 32 states that had high flu activity.
Flu season most severe city has seen, says calgary er head. An estimated 80,000 americans died of flu and its complications last winter. Since flu associated deaths in children became a nationally notifiable condition in 2004, the total number of flu associated deaths among children during one season has ranged from 37 during the 20112012 season to 186 during the 2017 18 season, as of april 19, 2019. In the united states, flu season occurs in the fall and winter. Australia saw an earlier start to its flu season this year and a higher number of cases, hospitalizations and deaths similar to a severe 2017 season that was closely in sync with canada, barr. Everyone 6 months and older get a flu vaccine each season. Influenza killed about 80,000 people in the 20172018 season, according to. For the 2016 2017 season, manufacturers projected they would provide between 157 million and 168 million doses of injectable vaccine for the u. Apr 24, 2020 the common flu causes up to 5 million cases of severe illness worldwide and kills up to 650,000 people every year, according to the world health organization. Nov 05, 2019 toronto the start of flu season is likely just around the corner. This web page provides estimates on the burden of influenza in the united states for the 2017 2018 influenza season. The flu season began in december and the public health agency of canada. Experts warned that if h3n2 dominated the northern hemispheres flu season, the vaccine might not provide much protection. Flumist quadrivalent, a live attenuated quadrivalent influenza vaccine given as a nasal spray, will not be available in canada for the 20192020 influenza season.
According to the public health agency of canada s fluwatch report, there was an increase in outbreaks and admissions to hospitals from dec. During the spring months of marchmay, influenza b virus became dominant. April 16 to april 22, 2017 week 16 april 9 to april 15, 2017 week 15 april 2 to april 8, 2017 week 14 march 26 to april 1, 2017 week march 19 to march 25, 2017 week 12 march 12 to march 18, 2017 week 11 march 5 to march 11, 2017 week 10 february 26 to march 4, 2017 week 9 february 19 to february 25, 2017 week 8. The quantity of vaccine that has been distributed is. Jan 14, 2020 a flu vaccine is injected in montreal, on tuesday, dec. Sep 27, 2018 flu killed 80,000 people this past season and put 900,000 into the hospital, making it the worst influenza season in decades, the centers for disease control and prevention said thursday. Flu vaccine is produced by private manufacturers, so supply depends on manufacturers. Both seasonal flu viruses which include influenza a and influenza b. The underappreciated burden of influenza amongst canadas older. During the 2017 18 influenza season, the national microbiology laboratory nml has characterized 351 influenza viruses 229 ah3n2, 26 ah1n1pdm09 and 96 b viruses that were received from canadian laboratories. Canadian data show low flu vaccine protection against h3n2.
Canada is in the midst of a rough flu season and the worst is. A flu vaccine is injected in montreal, on tuesday, dec. Since fluassociated deaths in children became a nationally notifiable condition in 2004, the total number of fluassociated deaths among children during one season has ranged from 37 during the 20112012 season to 186 during the 201718 season, as of april 19, 2019. Access all weekly influenza surveillance reports for 201718 season. While the beginning of major flu activity in each season varies by location, in any. The canadian pressryan remiorz toronto the public health agency of canada is reporting a significant increase in influenza. In weeks 15 to 19, exceptionally low levels of influenza activity were reported across canada.
A miserable flu season may be in the works as influenza arrives on canadas doorstep, experts are warning. The reports measure the vaccines effectiveness to improve it for the 20172018 flu season. While it might seem pointless to research an old vaccine, this could greatly help this years flu. At least 54 deaths, 15,500 cases so far this season ctv. The 20172018 flu season was severe for all us populations and resulted in an estimated 959,000 hospitalizations and 61,099 deaths. Flu broke records for deaths, illnesses in 20172018, new.
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. As australia battled a tough 2017 flu season, led by h3n2, researchers in late october reported interim flu ve at 33% overall, which is low, but protection against h3n2 was even lower, at 10%. During weeks 15 to 19, the percentage of tests positive for influenza 0. Influenza b is circulating much earlier than usual this season. The latest data available from the public health agency of canada shows sporadic flu activity in most provinces and. At midseason, flu vaccine yields 45% protection in us, 58% in. The centers for disease control and prevention estimates that so far this season, there have been at least 15 million flu illnesses for the 20192020 season, 140,000 hospitalizations and. Jun 27, 2018 the 2017 2018 influenza season in the united states was one of the most severe in recent memory. People who are at high risk of serious flu illness should take flu antiviral drugs quickly if they get sick. Flu broke records for deaths, illnesses in 20172018, new cdc. For current influenza maps and charts, see public health agency of canada links, below. Flu activity in canada high and continuing to rise, latest public. Canada is in the midst of a rough flu season and the worst. This is the highest number of patient claims since the 2009 flu season.
In general, flu season can start anytime in late fall, peak in midtolate winter usually january or february, and continue through early spring. Across canada, influenza ah3n2 accounted for the majority of laboratory confirmed cases. In general, flu season can start anytime in late fall, peak in midtolate winter usually january or february, and continue through. December 10, 2017 to december 16, 2017 week 50 december 3, 2017 to december 9, 2017 week 49 november 26 to december 2, 2017 week 48 november 19 to november 25, 2017 week 47.
At midseason, flu vaccine yields 45% protection in us, 58%. Influenza activity can sometimes be predicted and even tracked geographically. Influenza is a respiratory infection caused by influenza viruses of the family orthomyxoviridae. Summary of the 20162017 flu season passport health.