Most B.C. residents under 60 have been infected with COVID-19 or vaccinated: study | Canada News Media
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Most B.C. residents under 60 have been infected with COVID-19 or vaccinated: study

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A large study that chronicles the trajectory of COVID-19 over the first 2-1/2 years of the pandemic suggests most British Columbia children and adults younger than age 60 developed antibodies to slash their risk of severe illness — either through vaccination, infection or both.

Lead author Dr. Danuta Skowronski, an epidemiologist at the BC Centre for Disease Control, said the findings can be generalized to the rest of Canada due in part to a push to deliver first doses of vaccine and the “beast” of Omicron, which drove wave after wave of infections.

Antibodies to SARS-CoV-2, the virus that causes COVID-19, can be detected in the blood of people who have recovered from the disease and among those who have been vaccinated.

Researchers looked for antibodies in the leftover blood of a total of 14,000 people who had lab tests in British Columbia between March 2020, before the World Health Organization declared a pandemic, and August 2022, as the fast-spreading Omicron variant was evading vaccine protection.

They did eight analyses, amounting to snapshots of the virus’s presence in the population over the research period.

The study, published Monday in the Canadian Medical Association Journal, found that by January 2021, less than five per cent of people had been exposed to the virus.

But the proportion of those with COVID-19 antibodies rose to 56 per cent in June 2021 as vaccines were rolled out. It shot to 95 per cent in August of this year through a combination of vaccination and infection as Omicron became the dominant variant.

“The highest infection rates were in children and in parental-age adults. That likely reflects their greater interconnectedness, socially,” Skowronski said, adding that while data from other provinces is limited, similar findings have been reported in the United States.

The lowest infection rates were in the very old, as seen elsewhere in the world. She said that was possibly due to social isolation, and a high rate of vaccination and boosters among this age group, which is also at greatest risk of severe illness.

That points to the need for older adults to be prioritized for vaccination, Skowronski said.

The BC Centre for Disease Control launched similar seroprevalence surveys, which measure the attack rates of a particular illness in a population over time, during the 2009 swine flu pandemic caused by the H1N1 influenza virus.

It has completed several surveys during the COVID-19 pandemic, including one published in September that suggested at least 70 to 80 per cent of children and youth in Greater Vancouver and the Fraser Valley of B.C. had been infected. Another seroprevalence study is set to begin later this month to continue monitoring the virus’s tracks, Skowronski said.

The data can inform real-time policy decisions because without antibodies, a vast proportion of the population is susceptible to infection in a pandemic and that would crush the capacity of the health-care system, she said.

“As (the research) was unfolding, there were several points that I thought were really quite remarkable and in some ways a testament to the decisions that had been made in B.C., but not only in B.C., in Canada, because I think our findings are generalizable to other areas.”

Quick vaccine rollouts helped prevent further spread, she said.

“Canada went from being in a precarious position in January of 2021 in terms of vaccine supply to by June of 2021 being the world leader in vaccine coverage — outstripping the United Kingdom, even Israel, in terms of the proportion that had been vaccinated. And we show that in our seroprevalence survey, that swift uptake in vaccine coverage.”

Caroline Quach-Thanh, a professor in microbiology, infectious diseases and pediatrics at the University of Montreal, will co-lead a study surveying antibodies in children up to age 17 to detect the presence of past COVID-19 infection and/or vaccination.

The research team wants to obtain 36,000 samples of leftover blood from emergency departments in 14 children’s hospitals over five testing periods starting in January 2023.

The yearlong study will involve all provinces except Manitoba. New Brunswick and Newfoundland and Labrador will be excluded because they do not have children’s hospitals.

The hope is to gain more data on how COVID-19 has impacted youth across various provinces, and to be on the front lines of whatever the pandemic may bring next, Quach-Thanh said.

“The question is: Are we able to pick up something new that might be coming?”

—Camille Bains, The Canadian Press

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Canada to donate up to 200,000 vaccine doses to combat mpox outbreaks in Africa

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The Canadian government says it will donate up to 200,000 vaccine doses to fight the mpox outbreak in Congo and other African countries.

It says the donated doses of Imvamune will come from Canada’s existing supply and will not affect the country’s preparedness for mpox cases in this country.

Minister of Health Mark Holland says the donation “will help to protect those in the most affected regions of Africa and will help prevent further spread of the virus.”

Dr. Madhukar Pai, Canada research chair in epidemiology and global health, says although the donation is welcome, it is a very small portion of the estimated 10 million vaccine doses needed to control the outbreak.

Vaccine donations from wealthier countries have only recently started arriving in Africa, almost a month after the World Health Organization declared the mpox outbreak a public health emergency of international concern.

A few days after the declaration in August, Global Affairs Canada announced a contribution of $1 million for mpox surveillance, diagnostic tools, research and community awareness in Africa.

On Thursday, the Africa Centres for Disease Control and Prevention said mpox is still on the rise and that testing rates are “insufficient” across the continent.

Jason Kindrachuk, Canada research chair in emerging viruses at the University of Manitoba, said donating vaccines, in addition to supporting surveillance and diagnostic tests, is “massively important.”

But Kindrachuk, who has worked on the ground in Congo during the epidemic, also said that the international response to the mpox outbreak is “better late than never (but) better never late.”

“It would have been fantastic for us globally to not be in this position by having provided doses a much, much longer time prior than when we are,” he said, noting that the outbreak of clade I mpox in Congo started in early 2023.

Clade II mpox, endemic in regions of West Africa, came to the world’s attention even earlier — in 2022 — as that strain of virus spread to other countries, including Canada.

Two doses are recommended for mpox vaccination, so the donation may only benefit 100,000 people, Pai said.

Pai questioned whether Canada is contributing enough, as the federal government hasn’t said what percentage of its mpox vaccine stockpile it is donating.

“Small donations are simply not going to help end this crisis. We need to show greater solidarity and support,” he said in an email.

“That is the biggest lesson from the COVID-19 pandemic — our collective safety is tied with that of other nations.”

This report by The Canadian Press was first published Sept. 13, 2024.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

The Canadian Press. All rights reserved.

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How many Nova Scotians are on the doctor wait-list? Number hit 160,000 in June

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HALIFAX – The Nova Scotia government says it could be months before it reveals how many people are on the wait-list for a family doctor.

The head of the province’s health authority told reporters Wednesday that the government won’t release updated data until the 160,000 people who were on the wait-list in June are contacted to verify whether they still need primary care.

Karen Oldfield said Nova Scotia Health is working on validating the primary care wait-list data before posting new numbers, and that work may take a matter of months. The most recent public wait-list figures are from June 1, when 160,234 people, or about 16 per cent of the population, were on it.

“It’s going to take time to make 160,000 calls,” Oldfield said. “We are not talking weeks, we are talking months.”

The interim CEO and president of Nova Scotia Health said people on the list are being asked where they live, whether they still need a family doctor, and to give an update on their health.

A spokesperson with the province’s Health Department says the government and its health authority are “working hard” to turn the wait-list registry into a useful tool, adding that the data will be shared once it is validated.

Nova Scotia’s NDP are calling on Premier Tim Houston to immediately release statistics on how many people are looking for a family doctor. On Tuesday, the NDP introduced a bill that would require the health minister to make the number public every month.

“It is unacceptable for the list to be more than three months out of date,” NDP Leader Claudia Chender said Tuesday.

Chender said releasing this data regularly is vital so Nova Scotians can track the government’s progress on its main 2021 campaign promise: fixing health care.

The number of people in need of a family doctor has more than doubled between the 2021 summer election campaign and June 2024. Since September 2021 about 300 doctors have been added to the provincial health system, the Health Department said.

“We’ll know if Tim Houston is keeping his 2021 election promise to fix health care when Nova Scotians are attached to primary care,” Chender said.

This report by The Canadian Press was first published Sept. 11, 2024.

The Canadian Press. All rights reserved.

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Newfoundland and Labrador monitoring rise in whooping cough cases: medical officer

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ST. JOHN’S, N.L. – Newfoundland and Labrador‘s chief medical officer is monitoring the rise of whooping cough infections across the province as cases of the highly contagious disease continue to grow across Canada.

Dr. Janice Fitzgerald says that so far this year, the province has recorded 230 confirmed cases of the vaccine-preventable respiratory tract infection, also known as pertussis.

Late last month, Quebec reported more than 11,000 cases during the same time period, while Ontario counted 470 cases, well above the five-year average of 98. In Quebec, the majority of patients are between the ages of 10 and 14.

Meanwhile, New Brunswick has declared a whooping cough outbreak across the province. A total of 141 cases were reported by last month, exceeding the five-year average of 34.

The disease can lead to severe complications among vulnerable populations including infants, who are at the highest risk of suffering from complications like pneumonia and seizures. Symptoms may start with a runny nose, mild fever and cough, then progress to severe coughing accompanied by a distinctive “whooping” sound during inhalation.

“The public, especially pregnant people and those in close contact with infants, are encouraged to be aware of symptoms related to pertussis and to ensure vaccinations are up to date,” Newfoundland and Labrador’s Health Department said in a statement.

Whooping cough can be treated with antibiotics, but vaccination is the most effective way to control the spread of the disease. As a result, the province has expanded immunization efforts this school year. While booster doses are already offered in Grade 9, the vaccine is now being offered to Grade 8 students as well.

Public health officials say whooping cough is a cyclical disease that increases every two to five or six years.

Meanwhile, New Brunswick’s acting chief medical officer of health expects the current case count to get worse before tapering off.

A rise in whooping cough cases has also been reported in the United States and elsewhere. The Pan American Health Organization issued an alert in July encouraging countries to ramp up their surveillance and vaccination coverage.

This report by The Canadian Press was first published Sept. 10, 2024.

The Canadian Press. All rights reserved.

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