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COVID-19: Longer interval between vaccine doses means restrictions will be lifted sooner: Henry – Vancouver Sun

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Ontario and Alberta are considering following B.C.’s lead in delaying the second COVID-19 booster shot by 16 weeks.

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Experts are raising questions about B.C.’s 16-week interval between vaccine doses just as other Canadian provinces consider a similar approach in order to expand protection amid vaccine shortages.

Canada’s chief science adviser, Mona Nemer, told CBC News on Monday that B.C.’s decision to extend the interval to 16 weeks, or 112 days, amounts to a “population level experiment.”

“I think that it’s possible to do it. But it amounts right now to a basically population level experiment. And I think it needs to be done as we expect clinical trials to be carried out,” Nemer told CBC.

Postmedia News reached out to Nemer for an interview but she declined, referring to her earlier comments.

U.S. infectious disease expert Dr. Anthony Fauci has also said he doesn’t agree with spreading out the intervals between doses, a strategy used in the U.K.

Alberta and Ontario have announced they’re considering following B.C.’s lead and extending the interval to 16 weeks.

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B.C. provincial health officer Dr. Bonnie Henry said during a news conference Tuesday that extending the vaccine interval will allow most adults to receive their first jab by July, which will dramatically reduce transmission of the virus, hospitalization and deaths. The move is expected to free up about 70,000 doses.

The more people who are vaccinated with the first dose, Henry said, the sooner restrictions can be lifted on social gatherings and visits to long-term care homes. She pointed to research out of the U.K., Israel and Quebec that has shown one dose of the Pfizer or Moderna vaccine provides up to 90 per cent protection for up to four months.

“We know from the real-world data we don’t need to rely on second doses before we lift these restrictions if we have enough people protected with first doses,” Henry said. “We are now looking at months rather than many, many months before we can reach a level where people have enough protection. There is light ahead and it is getting brighter every day.”

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The original recommended interval between doses was 21 days for the Pfizer-BioNTech vaccine and 28 days for the Moderna vaccine. In late January, B.C. announced it was extending the interval to 42 days amid vaccine shortages.

Henry said B.C. is in a very different position from the U.S. because the province has a much more limited supply of the vaccine.

“We still have ongoing transmission in our community in quite a serious way,” she said. “So this makes sense for us … (especially) with the limited amount of vaccine we have in the coming weeks to be able to provide that protection that is safe and long-lasting.”

The National Advisory Committee on Immunization currently recommends an interval of no longer than six weeks but Henry said they will be updating that guidance in light of new research.

In February, a team of Scottish researchers analyzed data from the country’s mass immunization campaign, including more than one million people who had received the Pfizer or AstraZeneca vaccine, and found that a single dose provides protection for about five weeks and then starts to decline.

The study, which hasn’t been peer reviewed or published in a medical paper, found that one dose of the vaccine was about 84 per cent effective at preventing hospitalization but then began to decline, going to 61-per-cent-effective in the sixth week, then 58 per cent after that.

A University of Cambridge study that analyzed COVID-19 tests taken by 8,900 U.K. health-care workers found that asymptomatic coronavirus infections were four times less frequent in those who had received a single dose of the Pfizer vaccine compared with those who hadn’t been vaccinated. The study hasn’t been peer reviewed.

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On Tuesday, the province announced two more deaths from COVID-19 and 22 more cases of “variants of concern.” There were 438 total new COVID-19 cases on Monday, for a total of 81,367 confirmed cases since the start of the pandemic.

The majority of positive tests were recorded in the Lower Mainland, with Fraser Health reporting 249 new cases and Vancouver Coastal Health reporting 137.

Henry said a total of 182 variants of concern — 159 cases of the U.K. variant and 23 cases of the South African variant — have been detected in B.C. but only eight of the cases were considered active.

kderosa@postmedia.com
twitter.com/katiederosayyj


  1. B.C. COVID-19 vaccine plan: Seniors 80-plus can get vaccinated starting March 15


  2. COVID-19 update for March 2: B.C. records 438 new cases, two deaths

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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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