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COVID-19: Early studies look into Pfizer's Paxlovid for treating long COVID – CTV News

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CHICAGO —
Reports of two patients who found relief from long COVID after taking Pfizer’s antiviral Paxlovid, including a researcher who tested it on herself, provide intriguing evidence for clinical trials to help those suffering from the debilitating condition, experts and advocates say.

The researcher said her chronic fatigue symptoms, which “felt like a truck hit me,” are gone after taking the two-drug oral therapy.

Long COVID is a looming health crisis, estimated to affect up to 30 per cent of people infected with the coronavirus. It can last for months, leaving many unable to work. More than 200 symptoms have been associated with the condition, including pain, fatigue, brain fog, breathing difficulty and exhaustion after minimal amounts of physical activity.

Dr. Steven Deeks, a professor of medicine at the University of California, San Francisco (USSF), and an expert in HIV cure research, said drug companies tend to discount single-patient case studies. But such instances have helped drive HIV cure research, and Deeks thinks these Paxlovid cases could do the same for long COVID.

“This provides really strong evidence that we need to be studying antiviral therapy in this context as soon as possible,” said Deeks, adding that he has heard of yet another anecdotal case at UCSF in which a long COVID patient’s symptoms cleared after taking Paxlovid.

Scientists caution that these cases are “hypothesis-generating only” and not proof that the drug caused relief of lingering symptoms. But they lend support to a leading theory that long COVID may be caused by the virus persisting in parts of the body for months, affecting patients’ daily lives long after acute symptoms disappear.

The best evidence so far comes from a National Institutes of Health (NIH) study, currently under peer review, in which researchers conducted autopsies in 44 people who died of COVID-19 or another cause but were infected with COVID. They found widespread infection throughout the body, including in the brain, that can last more than seven months beyond the onset of symptoms.

Paxlovid, which combines a new Pfizer pill with the old antiviral ritonavir, is currently authorized for use in the first days of a COVID infection to prevent severe disease in high-risk patients.

Pfizer spokesman Kit Longley said the company does not have any long COVID studies underway and did not comment on whether it would consider them.

The drugmaker has two large clinical trials testing whether Paxlovid can prevent initial COVID infection. That “may provide us with relevant data to help inform future studies,” Longley said.

Patients who have been suffering for months are growing frustrated with the lack of pharmaceutical research for their condition.

There are currently fewer than 20 clinical trials led by individual researchers or small drugmakers testing treatments for long COVID, only a handful of which have moved beyond early stages, a Reuters review found.

Diana Berrent, founder of grassroots COVID-19 advocacy group Survivor Corps, has been lobbying the Biden Administration to fund large long COVID clinical trials.

“We shouldn’t be doing our research based on anecdotal reports,” she said. “That’s not good enough.”

‘BACK TO NORMAL’

In one of the case reports, published as a preprint ahead of peer review, a previously healthy and vaccinated 47-year-old woman became infected with COVID-19 in the summer of 2021. Most of her acute symptoms dissipated within 48 hours, but she continued to have severe fatigue, brain fog, exhaustion after exercise, insomnia, racing heartbeat and body aches severe enough that she could no longer work.

About six months after her initial infection, she was reinfected, likely with COVID-19, and many of her acute symptoms also returned. Her doctor prescribed a five-day course of Paxlovid.

On day 3, she noticed a rapid improvement of long COVID symptoms. “She’s back to normal,” said Dr. Linda Geng, co-director of Stanford Health Care’s long COVID clinic and author of the case report posted on Research Square.

In the second case, Lavanya Visvabharathy, 37, an immunologist working at Northwestern Medicine’s long COVID clinic, was infected in December 2021.

Her initial symptoms were mild, but she later experienced chronic fatigue, headaches and sleep disturbances for four months after infection. She also kept testing positive on rapid antigen tests, a sign of viral persistence

Visvabharathy was aware of the NIH study and the Stanford case, and decided to try Paxlovid to see if it could clear any lingering virus. Toward the end of the five-day course, her fatigue and insomnia had improved, and her headaches were less frequent. Two weeks after treatment ended, her fatigue was gone. “That’s 100 per cent fixed,” she said.

But to prove Paxlovid provides that kind of relief would require carefully controlled clinical trials, Visvabharathy said.

Dr. Igor Koralnik, who heads Northwestern Medicine’s clinic focused on the neurological effects of long COVID, noted the long list of widely-used medications that are affected by ritonavir and said Paxlovid “can’t be used willy nilly.”

“Paxlovid is not a benign medication,” he said. “There should be studies.”

(Reporting by Julie Steenhuysen. Editing by Michele Gershberg and Bill Berkrot) 

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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.

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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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