adplus-dvertising
Connect with us

Health

What's the monkeypox vaccine and who should get it? – CBC News

Published

 on


As the number of confirmed monkeypox cases continues to rise in Canada, infectious disease and public health experts are providing vaccinations to those at risk of infection.

Since monkeypox and smallpox are both part of the orthopox family of viruses, experts say some vaccines will work against both.

But the vaccines being recommended for use against monkeypox today are different from those used in the last century’s global effort to eradicate smallpox, the World Health Organization (WHO) says.

“Some countries have maintained strategic supplies of older smallpox vaccines from the Smallpox Eradication Programme (SEP) which concluded in 1980,” said the WHO’s interim monkeypox vaccination guidance issued on Tuesday.

“These first-generation vaccines held in national reserves are not recommended for monkeypox at this time, as they do not meet current safety and manufacturing standards.”

Monkeypox causes flu-like symptoms and skin lesions, and spreads through close contact.

Both WHO and Canada’s National Advisory Committee on Immunization (NACI) have now released guidelines on what vaccine to use against monkeypox, and who might benefit from it.

What monkeypox vaccine is available in Canada?

The vaccine approved for immunization against monkeypox in Canada is MVA-BN, or Modified Vaccinia Ankara – Bavarian Nordic. Bavarian Nordic, headquartered in Denmark, is the company that manufactures it.

In Canada, the vaccine has the trade name Imvamune. (It’s called Imvanex in the European Union and Jynneos in the U.S.)

Imvamune was originally authorized in Canada for “extraordinary use” against smallpox in November 2013, as part of the federal government’s emergency plan to immunize people if the deadly disease were ever to resurface. In 2020, Canada expanded the vaccine’s authorization to include immunization against monkeypox, NACI documents say.

An employee of the vaccine company Bavarian Nordic works in one of its laboratories near Munich, Germany, on May 24. The company’s Imvamune vaccine is approved in Canada for immunization against monkeypox. (Lukas Barth/Reuters)

Routine smallpox vaccinations stopped in Canada in the early 1970s. But because the viruses are related, those smallpox vaccinations may have provided some degree of immunity against monkeypox as well, experts say.

“It’s likely that this, you know, mass immunization campaign for smallpox really kept monkeypox in check for many years,” said Dr. Isaac Bogoch, an infectious diseases specialist at Toronto General Hospital.

But most people under 50 in Canada didn’t get that protection — and that might be one of the reasons we’re seeing monkeypox now, he said.

How is Imvamune different from the old-school smallpox vaccine?

Imvamune contains a weakened strain of the vaccinia virus, which provokes the immune response to fight off smallpox and monkeypox.

Unlike the original smallpox vaccine, this weakened virus is non-replicating, meaning it can’t make copies of itself.

Early-generation vaccines based on replicating vaccinia strains led to unpleasant side effects for some and could be problematic for people who were immunocompromised, said Dr. Zain Chagla, an infectious disease specialist at McMaster University in Hamilton.

In addition, older generations of smallpox vaccine are administered differently. Instead of a regular syringe, the health-care provider uses a “bifurcated needle” with two prongs and pricks the skin repeatedly to get the dose in.

Who should consider vaccination against monkeypox?

Infectious disease specialists say, right now, monkeypox is not affecting the majority of the general Canadian population, although anyone can get the virus if they’re in close physical contact with someone who is infected.

The LGBTQ community, particularly men who have sex with men, are at disproportionate risk of infection in this outbreak, they say. Health-care workers or lab workers who work directly with orthopoxviruses could also be at risk.

As a result, experts say monkeypox vaccinations should be offered to those at-risk populations as a preventative measure. The vaccine can also be offered to those who have already been exposed to someone with monkeypox — known as post-exposure prophylaxis.

In both cases, monkeypox immunization outreach needs to be targeted, they say.

“This is not a widespread vaccine for everyone; it is risk-based vaccination,” Chagla said.

Bogoch agreed.

“I don’t think we’re anywhere near starting, you know, vaccine campaigns for the general public,” he said.

“At this point in time, this should be a very focused and targeted vaccine campaign for people who have been exposed and for people who are at the highest risk of getting this infection.”

How many doses?

Both the WHO and NACI recommend two doses of Imvamune, given 28 days apart.

A possible exception, according to NACI’s guidance, is someone who has had a smallpox vaccination in the past. In that case, they could be given just one dose to act as a booster.

Are there any potential allergens in the vaccine?

Yes. NACI says Imvamune includes the following ingredients:

  • Traces of residual host (egg) cell DNA and protein.

  • Tromethamine (Trometamol, Tris).

  • Benzonase.

  • Gentamicin and ciprofloxacin.

Adblock test (Why?)

728x90x4

Source link

Continue Reading

Health

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

Published

 on

 

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.

Source link

Continue Reading

Health

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

Published

 on

 

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.

Source link

Continue Reading

Health

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

Published

 on

 

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.

Source link

Continue Reading

Trending