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Hydroxychloroquine doesn’t prevent COVID-19 in people exposed to the virus, study finds – Globalnews.ca

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Hydroxychloroquine is not effective in preventing the development of COVID-19 in people exposed to the novel coronavirus, a new study involving Canadian researchers concludes.

The results are published today in the New England Journal of Medicine.

The clinical trial was led in Canada by Dr. Todd Lee and Dr. Emily McDonald of the Research Institute of the McGill University Health Centre, in conjunction with partners at the University of Manitoba and University of Alberta.

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The Canadian research is co-ordinated with a large study by Dr. David Boulware at the University of Minnesota.


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It is the first double-blind, randomized, placebo-controlled trial to be completed assessing the effectiveness of the malaria drug hydroxychloroquine in preventing COVID-19.

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“We conducted an international, randomized controlled trial to look at whether the use of hydroxychloroquine in patients who’d had a high-risk exposure to COVID-19 would prevent the development of symptomatic disease compared to placebo,” Lee said in an interview.

Participants were recruited from Quebec, Manitoba, Alberta and across the United States. In total, the study involved 821 asymptomatic adults who had been exposed at home or in the health-care setting to someone with COVID-19.

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Among them, 719 participants reported a high-risk exposure to a confirmed case of COVID-19 _ being within two metres of the person for more than 10 minutes — without adequate personal protective equipment.

Most of these people were healthy young adults living in the community, with an average age of 40.


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Trump says he’s taking hydroxychloroquine as preventive measure against COVID-19

Within four days of exposure, participants received the placebo or hydroxychloroquine by mail, to be taken for a period of five days, beginning with a higher dose on the first day. Researchers and participants were not told which treatment was being administered.

“The approach was if we could load the patient with hydroxychloroquine in the tissues before the incubation period was over, then maybe we could prevent those people who’ve been exposed from getting sick,” Lee said.

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“There was some observational, anecdotal stories suggesting that this was going to be effective, and the purpose of the randomized controlled trial was to demonstrate whether that was true or not true.”

Out of 821 participants, 107 developed COVID-19 — confirmed either by a test or by compatible symptoms — during the 14 days of followup.

Among those who received hydroxychloroquine, 49 developed the disease or symptoms like fever and cough, compared to 58 in the group who received the placebo, meaning that statistically, the drug was no more effective than the placebo.

“We found that there was no statistical difference between patients who got the placebo — which was a vitamin pill — versus those who received the active drug hydroxychloroquine,” Lee said.

Two patients were hospitalized, one from each group, but no one has died.






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Coronavirus outbreak: U.K. health workers begin hydroxychloroquine trial


Coronavirus outbreak: U.K. health workers begin hydroxychloroquine trial

Side effects from the medication, such as nausea and abdominal discomfort, were more common in patients taking hydroxychloroquine than in those receiving placebo.

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Hydroxychloroquine is still being studied around the world, including whether it could reduce the risk of infection during exposure or lower the risk of hospitalization in infected patients. U.S. President Donald Trump has said he is taking hydroxychloroquine even though he has not tested positive for the coronavirus.

At the McGill University Health Centre, a trial looking at early treatment in the community is underway.

“I would have loved to have a positive study, but in circumstances like this you need the negative studies too so you can redirect attention,” Lee said.

© 2020 The Canadian Press

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Measles case reported locally turns out to be negative: health unit

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NEWS RELEASE
SIMCOE MUSKOKA DISTRICT HEALTH UNIT
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On March 26, the Simcoe Muskoka District Health Unit (SMDHU) was notified by Public Health Ontario’s (PHO) laboratory that due to laboratory error, the case of measles that had been lab-confirmed positive on March 12, based on symptoms and a positive urine measles laboratory result by PHO’s laboratory, is in fact negative for the measles virus.

“With this new information of the negative lab result, we believe that that individual was not infected with measles and that there has not been any public exposure to measles resulting from this individual’s illness,” said Dr. Charles Gardner, medical officer of health. “We recognize that notifying the public of what we believed to be a positive measles case in our area created worry, anxiety and disruption for some, and we regret this.

“We do know that, despite best efforts, on rare occasions laboratory errors can occur. We are working closely with the PHO’s laboratory to do all that we can to ensure that such an incident does not occur again.”

Measles is a highly contagious viral infection that spreads very easily through airborne transmission. The measles virus can live in the air or on surfaces for up to two hours.

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Symptoms of measles begin seven to 21 days after exposure and include fever, runny nose, cough, drowsiness, and red eyes. Small white spots appear on the inside of the mouth and throat but are not always present. Three to seven days after symptoms begin, a red, blotchy rash appears on the face and then progresses down the body.

The risk of transmission to those vaccinated with two doses is low, and when it does occur tends to show a reduction in the severity of these symptoms.

“Although we are relieved for the individual involved, and for all Simcoe-Muskoka residents, that this case has now been confirmed as negative, we know that measles is still active in Ontario at this time and the potential remains for new cases to arise, especially given the increase in Ontarians travelling to areas in the world that have higher numbers of measles cases,” said Dr. Gardner. “This is why we continue to advise individuals to keep up to date with their routine immunizations, including measles, mumps and rubella (MMR) vaccination.”

The risk of measles is low for people who have been fully immunized with two doses of measles vaccine or those born before 1970; however, many children have been delayed in receiving their routine childhood immunizations and people who have not had two doses of measles vaccine are at higher risk of contracting the disease.

People who do get sick usually recover without treatment, but measles can be more severe for infants, pregnant women, and those with compromised immune systems. Possible complications include middle-ear infections, pneumonia, diarrhea, or encephalitis (swelling of the brain) and occasionally death in the very young. Even individuals who are up to date with the measles vaccine should watch for symptoms of measles for 21 days after exposure.

For more information about measles, please visit smdhu.org or call Health Connection at 705-721-7520 or 1-877-721-7520, Monday to Friday between 8:30 a.m. and 4:30 p.m. to speak with a public health professional.

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Kate Middleton Not Alone. Cancer On Rise For People Under 50, Say Experts

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Kate Middleton revealed on Friday that her cancer was discovered after she received abdominal surgery

London:

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When Catherine, Princess of Wales, revealed she was being treated for cancer last week, part of the shock was that an otherwise healthy 42-year-old has a disease that mostly plagues older people.

However, researchers have been increasingly sounding the alarm that more and more people under 50 are getting cancer — and no one knows why.

Across the world, the rate of under-50s diagnosed with 29 common cancers surged by nearly 80 percent between 1990 and 2019, a large study in BMJ Oncology found last year.

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The researchers predicted the number of new cancer cases among younger adults will rise another 30 percent by the end of this decade, with wealthy countries particularly affected.

The increase in cases — and soaring global population — means that the number of deaths among under 50s from cancer has risen by nearly 28 percent over the last 30 years.

This occurred even as the odds of people of all ages surviving cancer have roughly doubled over the last half century.

Shivan Sivakumar, a cancer researcher at the UK’s University of Birmingham, called it an “epidemic” of young adult cancer.

Since Kate Middleton revealed on Friday that her cancer was discovered after she received abdominal surgery earlier this year, Sivakumar and other doctors have spoken out about the uptick in younger cancer patients they have been seeing at their clinics.

While breast cancer remains the most common for people under 50, the researchers expressed particular concern about the rise of gastrointestinal cancers — such as of the colon, pancreas, liver and oesophagus — in younger adults.

Colon cancer is now the leading cause of cancer deaths in men under 50 in the United States, according to the American Cancer Society. For women, it is number two — behind only breast cancer.

One high profile case of colorectal cancer was “Black Panther” actor Chadwick Boseman, who died at the age of 43 in 2020.

Why is this happening?

“We just don’t have the evidence yet” to say exactly what is causing this rise, Sivakumar told AFP, adding it was likely a combination of factors.

Helen Coleman, a cancer epidemiology professor at Queen’s University Belfast who has studied early onset cancer in Northern Ireland, told AFP there were two potential explanations.

One is that people in their 40s were exposed to factors known to cause cancer — such tobacco smoke, alcohol or being obese — at an earlier age than previous generations.

She pointed out that the “obesity epidemic” did not start until the 1980s.

Sivakumar felt that at least part of the puzzle could be explained by obesity.

However, there is “another wave” of under-50 patients who are neither obese nor genetically predisposed still getting cancer, he emphasised, adding that this could not be put down to “statistical chance”.

The other theory, Coleman said, is that “something different” has been going on with her generation.

Fingers have been pointed out a range of possible culprits — including chemicals, new drugs and microplastics — but none have been proven.

Some have suggested that so-called ultra-processed foods could be to blame. “But there’s very little data to back any of that up,” Coleman said.

Another theory is that the food we eat could be changing our gut microbiome.

While there is nothing conclusive yet, Coleman said her own research suggested that cancer causes changes to the microbiome, not the other way around.

Anti-vaxx conspiracy theorists have even tried to blame Covid-19 vaccines.

This is easily disproven, because the rise in young adult cancer has taken place over decades, but the vaccines have only been around for a few years.

What can be done?

To address the rise in younger colorectal cancer, in 2021 the US lowered the recommended age for screening to 45. Other countries have yet to follow suit.

But the researchers hoped that Catherine’s experience would remind people at home that they should consult their doctor if they sense anything is wrong.

“People know their bodies really well,” Sivakumar said.

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“If you really feel that something isn’t right, don’t delay — just get yourself checked out.”

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Almost 3,000 students suspended in Waterloo Region over immunization issues

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Close to 3,000 children attending elementary school across Waterloo Region were suspended from school on Wednesday morning for not having up-to-date immunization records.

The region says Waterloo Public Health suspended 2,969 students under the Immunization of School Pupils Act (ISPA).

For several months, the region has been campaigning for people to get their children’s vaccinations up to date, including sending letters home to parents on a couple of occasions, warning that students’ records needed to be up to date or they would be suspended.

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It announced in January that 32,000 students did not have up-to-date records: 22,000 elementary students and 10,000 high school students.


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“We have made remarkable progress from the original 27,567 immunization notices we sent to parents in November and December 2023,” Dr. Hsiu-Li Wang, medical officer of health, stated.

“Since that time, we have resolved more than 24,500 outdated vaccination records, providing students with valuable protection against these serious and preventable diseases.”

The high school students still have a few weeks to get their records up to date or else face suspension.

The ISPA requires students to have proof-of-vaccination records for diphtheria, polio, tetanus, pertussis, measles, mumps, rubella, varicella (chickenpox) and meningitis, which must be on file with public health.

Public health says caregivers whose children are suspended will need to book an appointment at regionofwaterloo.ca/vaccines for clinics, which will be held in Cambridge and Waterloo on weekdays.

“Given the high number of suspensions, it may take several days before you can be seen at an appointment and return your child to school,” a release from the region warns.

“Record submission and questions must be done in person to ensure immediate resolution.”

The last time suspensions over immunizations were issued was in 2019, when 1,032 students were suspended.

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