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Why you shouldn’t worry about pets spreading COVID-19

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A Pomeranian dog in Hong Kong grabbed the international media’s attention this week after scientists found traces of coronavirus in the canine. Following confirmation that the dog’s owner was positive for the virus causing COVID-19, the dog was taken from Hong Kong Island to a nearby animal quarantine facility. Subsequent tests performed on swabs collected from the dog’s nose and throat unexpectedly revealed coronavirus.

These results have raised many questions and concerns. Can our dogs really catch the virus? Should we be worried about our pets getting sick? Could dogs spread coronavirus between people?

A positive test for coronavirus in this dog simply means that a small piece of the viral genome was detected in a sample. PCR (a test used to detect genetic material) is a highly sensitive method of testing but is unable to tell whether coronavirus was replicating in the dog or whether the dog had simply licked contaminated surfaces in the home.

It is unknown exactly how long the virus causing COVID-19 disease, called SARS-CoV-2, can survive in the environment. A study of other coronaviruses suggests they can remain infectious for several days if the temperature and humidity are right. Given that we don’t even know if the virus detected was infectious or not, we have no idea whether virus replication occurred in this particular dog.

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We know that SARS-CoV-2 is transmitted by droplets, so it’s possible that dogs could act as dirty tissues, or “fomites,” that walk the virus around if adequate hygiene is not maintained.

Whereas SARS-CoV-2 has the limelight at present, there are actually many different types of coronaviruses, and coronaviruses infecting dogs is nothing new. The first coronavirus to be reported in dogs was back in 1974. More recently in 2003, a novel canine coronavirus causing the respiratory disease was identified in dogs in an animal shelter in the UK. This virus has since been reported worldwide.

Although canine coronaviruses are distinct from SARS-CoV-2, dogs are clearly susceptible to this family of viruses. Despite this, there are no previous instances of human coronaviruses infecting dogs or vice versa. For a virus to jump species, there are several hurdles they must overcome.

The major barrier that stops a virus infecting a new type of animal is the host-cell surface. To infect canine cells, SARS-CoV-2 must be able to bind (attach) to canine receptors. Thanks to rapid research, we now know that SARS-CoV-2 uses the proteins ACE2 and TMPRSS2 to gain entry into cells. Dogs have both these proteins, but they are not identical to the human versions, so the virus may not be able to use them as efficiently.

If we assume that the virus can bind, enter and replicate within canine cells (this is still a big if), then it is reasonable for dog owners to be worried about whether their dogs will become sick following infection. It is reassuring that the Pomeranian at the center of this media attention has not shown any signs of illness. Though this is a single case study, there is no reason to believe that the human virus should cause disease in dogs at this stage.

Could dogs transmit SARS-CoV-2 to humans?

To pass on coronavirus, the virus must replicate in dogs at high enough levels to be released from the body. Reports state that only low levels of the virus could be detected in the Pomeranian. How much virus does it take to infect a person? Again, we don’t yet know.

We do know for a number of different viruses that, although human-to-dog transmission is theoretically possible, the human-to-human spread is much more efficient. We and others have shown that dogs can be susceptible to human norovirus, a major cause of vomiting and diarrhea worldwide. Yet despite millions of cases of this virus each year, only a single definitive instance of human-to-dog transmission has been reported. Full genome sequencing was instrumental in that particular case, and will also be required to conclusively prove a role for dogs in the current SARS-CoV-2 outbreak.

Even in the worst-case scenario of coronavirus being able to replicate in dogs at reasonable levels, it is safe to assume that you are much more likely to be infected by your neighbor than your dog. However, it is essential to practice good hygiene around any pets. This will prevent them from inadvertently carrying viruses on their coats and spreading it from person to person. Please cough into your elbow, not on to your dog.

This article was originally published on The Conversation by Sarah L Caddy at the University of Cambridge. Read the original article here. Edited by Harry Miller

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Pregnant women in the Black Country urged to get whooping cough vaccine – BBC.com

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Pregnant women urged to get whooping cough vaccine

Babies are routinely given the vaccine at eight, 12 and 16 weeks

Pregnant women in the Black Country are being urged to get vaccinated against whooping cough after a rise in cases.

The bacterial infection of the lungs spreads very easily and can cause serious problems, especially in babies and young children.

The Black Country Integrated Care Board (ICB) is advising pregnant women between 16 and 32 weeks to contact their GP to get the vaccine so their baby has protection from birth.

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The UK Health Security Agency warned earlier this year of a steady decline in uptake of the vaccine in pregnant women and children.

Symptoms of the infection, also known as “100-day cough”, are similar to a cold, with a runny nose and sore throat.

Sally Roberts, chief nursing officer for the ICB, which covers Wolverhampton, Dudley, Walsall and Sandwell, said anyone could catch it, but it was more serious for young children and babies.

“Getting vaccinated while you’re pregnant is highly effective in protecting your baby from developing whooping cough in the first few weeks of their life – ideally from 16 weeks up to 32 weeks of pregnancy,” she said.

“If for any reason you miss having the vaccine, you can still have it up until you go into labour.”

Follow BBC West Midlands on Facebook, X and Instagram. Send your story ideas to: newsonline.westmidlands@bbc.co.uk

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Measles cases stabilize in Montreal – CityNews Montreal

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The number of measles cases has stabilized, according to the Montreal Public Health.

Since March 25, there have been no contaminations reported within the community.

“Our teams have identified all contact cases of measles,” said media relations advisor Geneviève Paradis. “It’s a laborious task: each measles case produces hundreds of contacts.”

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All community transmission cases since February 2024 have been caused by returning travelers who were either unvaccinated or partially vaccinated.

Currently, there are 18 measles cases in Montreal – with 46 total in Quebec. This according to the April 18 figures from the provincial government.

“With the summer vacations approaching, if you’re travelling, it is essential to check if you are protected against measles,” explained Paradis.

According to Montreal Public Health, a person needs to have received two doses after the age of 12 months to be immunized against the virus.

They’ve launched a vaccination campaign throughout the region, and currently, 11,341 people have been vaccinated against measles in Montreal between March 19 and April 15.

Vaccination is also being provided in schools and at local service points.

“The vaccination operation is under the responsibility of the five CIUSSS of the territory,” concluded Paradis.

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Risk of bird flu spreading to humans is ‘enormous concern’, says WHO – The Guardian

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The World Health Organization has raised concerns about the spread of H5N1 bird flu, which has an “extraordinarily high” mortality rate in humans.

An outbreak that began in 2020 has led to the deaths or killing of tens of millions of poultry. Most recently, the spread of the virus within several mammal species, including in domestic cattle in the US, has increased the risk of spillover to humans, the WHO said.

“This remains I think an enormous concern,” the UN health agency’s chief scientist, Jeremy Farrar, told reporters in Geneva.

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Cows and goats joined the list of species affected last month – a surprising development for experts because they were not thought susceptible to this type of influenza. US authorities reported this month that a person in Texas was recovering from bird flu after being exposed to dairy cattle, with 16 herds across six states infected apparently after exposure to wild birds.

The A(H5N1) variant has become “a global zoonotic animal pandemic”, Farrar said.

“The great concern of course is that in … infecting ducks and chickens and then increasingly mammals, that virus now evolves and develops the ability to infect humans and then critically the ability to go from human to human,” he added.

So far, there is no evidence that H5N1 is spreading between humans. But in the hundreds of cases where humans have been infected through contact with animals over the past 20 years, “the mortality rate is extraordinarily high”, Farrar said, because humans have no natural immunity to the virus.

From 2003 to 2024, 889 cases and 463 deaths caused by H5N1 have been reported worldwide from 23 countries, according to the WHO, putting the case fatality rate at 52%.

The recent US case of human infection after contact with an infected mammal highlights the increased risk. When “you come into the mammalian population, then you’re getting closer to humans”, Farrar said, warning that “this virus is just looking for new, novel hosts”.

Farrar called for increased monitoring, saying it was “very important understanding how many human infections are happening … because that’s where adaptation [of the virus] will happen”.

“It’s a tragic thing to say, but if I get infected with H5N1 and I die, that’s the end of it,” he said. “If I go around the community and I spread it to somebody else then you start the cycle.”

He said efforts were under way towards the development of vaccines and therapeutics for H5N1, and stressed the need to ensure that regional and national health authorities around the world had the capacity to diagnose the virus.

This was being done so that “if H5N1 did come across to humans, with human-to-human transmission”, the world would be “in a position to immediately respond”, Farrar said, calling for equitable access to vaccines, therapeutics and diagnostics.

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