Canadians diagnosed with most common cancers are more likely to survive the disease if they detect it at an earlier stage, according to a new report from Statistics Canada.
The study, released Wednesday, offers the first ever Canadian estimates of five-year cancer survival by stage at diagnosis.
It looked at cases of the most commonly diagnosed cancers in Canada between 2010 and 2017, including lung, breast, prostate, colon and rectal cancer — all of which collectively make up almost half of all diagnosed cancer cases in Canada.
The results showed the probability of surviving these cancers decreases if they are diagnosed at a more advanced stage of the disease.
For example, women diagnosed with breast cancer experienced five-year net survival rates of 100 per cent when the disease was detected in stage I, 92 per cent in stage II, 74 per cent in stage III and 23 per cent in stage IV.
For colon cancer, five-year net survival decreased from 92 per cent at stage I to 11 per cent at stage IV, whereas for prostate cancer, the prognosis was close to 100 per cent for the first three stages, then declined to 41 per cent at stage IV.
Overall, net survival rates exceeded 90 per cent for all cancers studied that were caught in stage I, except for lung cancer.
For lung cancer, survival rates dropped by just over 20 percentage points between stages I and II of the disease as well as from stage II to III, and decreased by another 13 points from stage III to IV.
“The work showcases the stage at diagnosis as a key predictor of prognosis and highlights the importance of detecting cancer at an early stage, when treatment is most effective,” the study says.
“The findings can be used by Canadian health professionals to better inform health policy and treatment evaluation.”
The study did find some exceptions to the overall trend of early diagnosis leading to higher survival rates.
In prostate cancer, the statistics showed survival rates were consistently about 100 per cent for the first three stages of the disease, but declined substantially when diagnosed at stage IV.
Survival rates also did not improve at any stage for colon or rectal cancer cases, according to the data.
Differences in outcomes between men and women were most pronounced for lung cancer, where net survival rates among females exceeded those of males at each stage.
Age was also an important predictor, as rates of survival of all cancers studied generally decreased the older a patient was, particularly for early-stage lung cancer.
Between the years 2010 and 2012 and from 2015 to 2017, significant increases in survival rates were observed among stage IV prostate and female breast cancer cases, and among both early- and late-stage lung cancer.
Governments seek buyer as Quebec COVID-19 vaccine manufacturer Medicago set to close
Quebec Economy Minister Pierre Fitzgibbon said Friday the province has had preliminary talks with potential buyers in the pharmaceutical sector to keep Medicago’s expertise and skilled workforce in Quebec. He said both the Quebec and federal governments would be willing to put in money to secure a deal.
“We can’t operate it ourselves; the government will not be the main shareholder,” Fitzgibbon said. “But if there is a pharmaceutical company that considers it’s worth continuing, we’re ready to help.”
Mitsubishi Chemical said Thursday it would stop marketing the Medicago-produced Covifenz vaccine, which is plant-based and was approved by Health Canada one year ago for adults aged 18 to 64.
The Japanese chemical company said it had been preparing to commercially produce the Covifenz vaccine but decided against doing so because of the “significant changes” in the COVID-19 vaccine environment. The company said it would dissolve Medicago because it is no longer “viable” to continue marketing its products.
“In light of significant changes to the COVID-19 vaccine landscape since the approval of Covifenz, and after a comprehensive review of the current global demand and market environment for COVID-19 vaccines and Medicago’s challenges in transitioning to commercial-scale production, the (company) has determined that it will not pursue the commercialization of Covifenz,” Mitsubishi Chemical said in a statement.
Following the announcement, Medicago issued a statement thanking its employees. “The Medicago team has pushed scientific boundaries and we know that they will continue to make incredible contributions to innovation and biopharmaceutical’s sector.”
Canada invested $173 million in Medicago in 2020 to support development of the Covifenz vaccine and help Medicago expand its production facility in Quebec City.
On Thursday, Innovation, Science and Industry Minister François-Philippe Champagne told reporters the federal government is in “solution mode.”
“Our first order of business is really to try to find a partner who can help us preserve the jobs, preserve the technology and the intellectual property,” Champagne said.
The minister acknowledged that mRNA vaccine technology for COVID-19 became dominant as it “seemed to be most effective.”
But Medicago’s plant-based vaccine was still “promising,” Champagne said.
“Everyone agreed that the plant-based vaccine could very well help in a future pandemic,” Champagne said.
Speaking to reporters on Montreal’s South Shore Friday, Fitzgibbon said the company informed the province at the end of December it intended to pull the plug on Medicago.
In May 2015, Quebec and Ottawa announced loans of $60 million and $8 million, respectively, for the construction of a complex in the Quebec City region to house Medicago’s activities.
“The challenge is not (getting the loan repaid), it’s how we can save the jobs, save this company,” Fitzgibbon said.
While Canada authorized Medicago’s vaccine in February 2022, it was rejected for emergency use by the World Health Organization in March because tobacco company Philip Morris was a minority shareholder in the company, contravening a policy adopted in 2005 by the United Nations agency.
Quebec City Mayor Bruno Marchand said on Twitter he was saddened by the closure of the company.
“My thoughts are with the families who learned some very sad news,” Marchand said Thursday evening. “We have to roll up our sleeves to keep all this expertise in the field of health innovation in Quebec City.”
This report by The Canadian Press was first published Feb. 3, 2023.
Sidhartha Banerjee, The Canadian Press
Bird flu keeps spreading beyond birds. Scientists worry it signals a growing threat to humans, too
As a deadly form of avian influenza continues ravaging bird populations around much of the world, scientists are tracking infections among other animals — including various types of mammals more closely related to humans.
Throughout the last year, Canadian and U.S. officials detected highly pathogenic H5N1 avian flu in a range of species, from bears to foxes. In January, France’s national reference laboratory announced that a cat suffered severe neurological symptoms from an infection in late 2022, with the virus showing genetic characteristics of adaptation to mammals.
Most concerning, multiple researchers said, was a large, recent outbreak on a Spanish mink farm.
Last October, farm workers began noticing a spike in deaths among the animals, with sick minks experiencing an array of dire symptoms like loss of appetite, excessive saliva, bloody snouts, tremors, and a lack of muscle control.
The culprit wound up being H5N1, marking the first known instance of this kind of avian influenza infection among farmed minks in Europe, notes a study published in Eurosurveillance this month.
“Our findings also indicate that an onward transmission of the virus to other minks may have taken place in the affected farm,” the researchers wrote.
Eventually, the entire population of minks was either killed or culled — more than 50,000 animals in total.
That’s a major shift, after only sporadic cases among humans and other mammals over the last decade, according to Michelle Wille, a researcher at the University of Sydney who focuses on the dynamics of wild bird viruses.
“This outbreak signals the very real potential for the emergence of mammal-to-mammal transmission,” she said in email correspondence with CBC News.
It’s only one farm, and notably, none of the workers — who all wore face shields, masks, and disposable overalls — got infected.
But the concern now, said Toronto-based infectious disease specialist Dr. Isaac Bogoch, is if this virus mutates in a way that allows it to become increasingly transmissible between mammals, including humans, “it could have deadly consequences.”
“This is an infection that has epidemic and pandemic potential,” he said. “I don’t know if people recognize how big a deal this is.”
H5N1 has high mortality rate
Among birds, the mortality rate of this strain of highly pathogenic avian influenza can be close to 100 per cent, causing devastation to both wild bird populations and poultry farms.
It’s also often deadly for other mammals, humans included.
The World Health Organization (WHO) has documented 240 cases of H5N1 avian influenza within four Western Pacific countries — including China, Cambodia, Laos, and Vietnam — over the last two decades. More than half of the infected individuals died.
Global WHO figures show more than 870 human cases were reported from 2003 to 2022, along with at least 450 deaths — a fatality rate of more than 50 per cent.
Bogoch said the reported death toll may be an overestimate, since not all infections may be detected, though it’s clear people can “get very, very sick from these infections.”
Most human infections also appeared to involve people having direct contact with infected birds. Real-world mink-to-mink transmission now firmly suggests H5N1 is now “poised to emerge in mammals,” Wille said — and while the outbreak in Spain may be the first reported instance of mammalian spread, it may not be the last.
“A virus which has evolved on a mink farm and subsequently infects farm workers exposed to infected animals is a highly plausible route for the emergence of a virus capable of human-to-human transmission to emerge,” she warned.
Louise Moncla, an assistant professor of pathobiology at the University of Pennsylvania school of veterinary medicine, explained that having an “intermediary host” is a common mechanism through which viruses adapt to new host species.
“And so what’s concerning about this is that this is exactly the kind of scenario you would expect to see that could lead to this type of adaptation, that could allow these viruses to replicate better in other mammals — like us.”
Surveillance, vaccines both needed
What’s more reassuring is the ongoing development of influenza vaccines, giving humanity a head start on the well-known threat posed by bird flu.
Wille noted the earlier spread of H7N9, another avian influenza strain which caused hundreds of human cases in the early 2010s, prompted similar concern that the virus would acquire the mutations needed for ongoing human-to-human transmission.
“However, a very aggressive and successful poultry vaccination campaign ultimately stopped all human cases,” she added.
But while several H5N1 avian influenza vaccines have been produced, including one manufactured in Canada, there’s no option approved for public use in this country.
To ward off the potential threat this strain poses to human health, Bogoch said ongoing surveillance and vaccine production needs to remain top-of-mind for both policy makers and vaccine manufacturers.
Dr. Jan Hajek, an infectious diseases physician at Vancouver General Hospital, also questioned whether it’s time to wind down global mink farming, given the spread of various viruses, from avian influenza to SARS-CoV-2, the virus behind COVID-19.
“We’re closely related to minks and ferrets, in terms of influenza risks … if it’s propagating to minks, and killing minks, it’s worrisome to us,” he said.
In 2021, B.C. officials announced an end to mink farming across the province, saying the farms can be reservoirs for viruses and represent an ongoing danger to public health. All mink farm operations must be shut down, with all of the pelts sold, by April 2025.
However, other provinces — and plenty of countries — do intend to keep their mink farms operating.
“Is it responsible to have these kinds of farming conditions where these types of events can occur?” questioned Moncla. “If we’re going to keep having these types of farms, what can we do to make this safer?”
6,654 students facing suspension due to out-of-date immunization records
The Windsor-Essex County Health Unit (WECHU) has issued about 6,654 suspension orders to students who do not meet immunization requirements.
WECHU completed a review of all elementary student immunization records in December and more than 12,000 students received a notice.
These students were either overdue for one or more vaccines required to attend school, or their immunization records were not updated with the health unit.
“While many of these vaccines are normally administered by primary health care providers, parents and guardians of children who received their vaccines from their health care provider still need to report this information to the health unit,” said a WECHU news release.
The Immunization of School Pupils Act (ISPA) (1990), Section 11, Subsections (1) and (2) requires public health units to maintain and review vaccine records for every student attending school and to enforce a school suspension for incomplete immunization information. As the next step of the ISPA enforcement process, orders were mailed out to students that do not meet this requirement.
WECHU said this is the final notice.
The suspension order notifies parents and guardians that immunization records must be updated to the WECHU by Thursday, March 16, at 6 p.m. or their child will be suspended for up to 20 days from school, starting Monday, March 20, 2023. Once parents and guardians provide the missing immunization information to the WECHU, the student is removed from the suspension list and can attend school again.
Under the ISPA , children can be exempted from immunization for medical reasons or due to conscience or religious belief.
Families can book immunization appointments with their health care provider and are reminded to update their child’s immunization records online at immune.wechu.org.
Catch-up immunization clinics are also being offered at the WECHU Windsor and Leamington offices and will continue until the end of March. Families can book an appointment at a WECHU clinic by visiting wechu.org/getimmunized or by calling the WECHU at 519-960-0231.
Federal government asking RCMP to ban use of sponge rounds, CS gas for crowd control
Inuit, environmental groups call for stronger measures to reduce underwater noise
Ottawa expands price caps to Russian petroleum products to reduce revenues
Silver investment demand jumped 12% in 2019
Iran anticipates renewed protests amid social media shutdown
Search for life on Mars accelerates as new bodies of water found below planet’s surface
Business18 hours ago
Elon Musk found not guilty of fraud over Tesla tweet
News18 hours ago
Anti-Ukrainian vandalism, harassment rising at Canadian universities, students say
News17 hours ago
Migrant worker secret menus in Canada expose exploitation
Media16 hours ago
Canada adds Russian media personalities, companies in latest round of sanctions
Art19 hours ago
Richmond Art Gallery’s central location makes art easily accessible
News17 hours ago
Ottawa tight-lipped on details as Canada, U.S. call out China over balloon
News5 hours ago
Tobogganing rules in some Canadian cities draw criticism – CTV News
Media5 hours ago
Canada adds Russian media personalities, companies in latest round of sanctions – CP24