Let's Watch Dogs Sniff Out COVID in Finland and Imagine Our Future

Scientists found Covid has a “smell” that a trained dog can sniff out in less than a second. I remember there were dogs in my grandma's house. One of them was a small Peking dog, which barked loudly. Her name was “豆豆” (Small Beans), which I then found out was the mother of the other three big ones. The next time I came back to visit my grandma, I saw her bark at me when I came close to the door and crawled towards me with her nose on the floor. She sniffed my shoes, shook her tail happily in recognition. I brushed her hair, and she ran away. It was nothing strange, but then I found out… She lost her eye in a fight with dogs from another place. And the remaining one was injured, with limited eye-sight. Then how did she know I was there, and still remember me? Small Beans had one eye blinded. Because dogs ‘see’ the world through their noses. “Small Beans,” the dog in the middle and his son on the left. | Copyright by the author Covid Dog Detectives? Humans have taken advantage of dogs’ excellent sense of smell for decades. Dogs have a powerful sense of smell; they , compared to about six million in us. That is why their nose can smell more than what we see and smell together. possess up to 300 million olfactory receptors in their noses So here comes the good news. are trying to test whether they can . The results are positive. The trained sniffer dogs can distinguish randomized samples, both positive and negative, with an Researchers detect saliva samples from COVID-19-infected patients in a recent study overall detection rate of 94%. Soon we will see airport security personnel standing alongside a Covid detective. That would help us spot the infected person within seconds and prevent wide infections of Covid, or even better, another acute pandemic. King of Smell It is not so surprising as sniffer dogs are already familiar animals in airports and cargo stations where they help humans do the dangerous job of detecting . But without too much attention, scientists are already exploring the possibility of using dogs to detect disease. firearms, drugs, and explosives In 2018, British entomologist Steve Lindsay studied malaria at Durham University in the U.K. . One year later, in 2019, scientists have also reported trained dogs can reported that dogs could sniff malaria detect some cancers . We cannot truly know what the dog smells from cancer, as we do not have the same senses. But researchers believed that patients who got cancers that canines can detect. On the other hand, dogs can of patients carrying malaria as those little creatures produce a specific “scent.” carried a signature scent detect micro-organisms living inside the blood The Experiments Scientists in different countries turned sniff dogs' experiments to COVID-19 early in the pandemic. They have trained their dogs to smell samples, most often of sweat, and to sit or paw the floor when they detect signs of a positive infection. Trials at airports in the , and , are using dogs to detect COVID-19 in sweat samples from passengers in the airport. The tests are then cross-checked with conventional lab tests. United Arab Emirates Lebanon , Finland According to a French- research team: Lebanese The animals can detect Covid-19 in , after smelling Now they are training 20 dogs belonging to Lebanon's security forces to screen arrivals at Beirut airport. almost 100% of cases human sweat. You can see the dogs in actions here: Covid-sniffing dogs deployed at Helsinki airport One point that needed to be emphasized is the detection results from dogs had identified cases inferring that COVID-19 sniffing dogs can spot infection days before conventional tests picked up the virus, before symptoms start. We have Vaccines coming; why do we need sniff screening? Now we have the schedule of effective vaccinations coming, will the Covid sniffing dogs be redundant before they get to work in public? The short answer is No. As you may know, vaccinations will take months to get to a large population. There are regions that will not have access to vaccinations for years. More importantly, we still after vaccination (please refer to ). do not know how long the immunity will last CDC on the facts about vaccines But what we can be sure of is once “ from what samples should be collected, how to collect samples, to train the dogs to detect them. We can to another “unknown virus attack” next time. this procedure” can be standardized, respond better and faster Yes, there will be a “next time.” Yeah, I know. We all want to go back to “normal” ASAP. I cannot withstand being in the voluntary “house arrest” for another year. However, we all now know the Covid has already . undergone gene-shifting several times This is what I know better; the virus can change like a computer virus. Thus, infections and vaccinations are like what we encounter on our computers’ antivirus software — signature update and malware. Most of us would prefer walking by a dog before entering the stadium than watching the game on TV, right? It may not be normal we used to have. But at least we can meet again, have people grouped in airports, sports stadiums, train stations, universities, etc. Imagine there are teams of trained dogs in a short time ready for work. People in crowded areas like concerts, airports, train stations can line up and walk past the Covid detectives, canines, one by one. Screening for suspected patients would be within seconds. My Concerns In Hong Kong, we reported several positive-detection of Covid on dogs. From , the blood tests from 17 dogs and 8 cats, only 2 dogs had tested positive for the COVID-19 virus. the Agriculture, Fisheries and Conservation Department (AFCD) test result, Hong Kong https://www.scmp.com/news/hong-kong/health-environment/article/3114035/hong-kong-police-dog-tests-preliminary-positive https://www.scmp.com/news/hong-kong/health-environment/article/3096201/coronavirus-scottish-shorthair-yorkshire-terrier The finding indicated that and there is no evidence that they play a role in the spread of the virus. The dog has shown no symptoms so far, yet, there are dogs and cats are not infected easily with this virus, still many unknowns. Although the risk of , It would be better to see on the possibility of Covid infections on dogs before agreeing to train them methodologically. animals spreading COVID-19 to people is considered very low more test results Where is all this heading? . I know it is not fair to have the dogs sniffing all dogs and work for us on this disgusting career. Meanwhile, scientists are now striving to find the next “sniff detectives.” Dogs can be trained within days to have over 90% accuracy Researchers are working on Using a robot to sniff the virus would be much more effective and work 7 x 24 as long as there is electricity. new electronic particle sensors to detect covid particles. If the particle sensor is a success, One day we can have ticket machines for the train that has the covid-sensor embedded, or more aggressively on the elevator button panel. someone with a contagious disease can be screened when pressing a button. By doing that, we can have an advancement in virus detection that can detect multiple deadly viruses and bacteria all at once within a second. From that point, we can take back our “normal” life. Final words Though, the recent study is only a . There will be several independent peer reviews before anything is put into practice. The test is still at an early stage; the result is quite promising. Proof-of-Concept test With proper but short training, dogs can become detectives of COVID-19 or another dangerous and viral unknown virus. Dogs' screening diseases could be the proper and faster screening soon, which is way better than what we are doing with tubes and labs today. Thank you for reading! Happy reading and sniffing. References: https://doi.org/10.1093%2Fofid%2Fofy179 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Abstract&list_uids=16484712 https://www.lshtm.ac.uk/research/centres-projects-groups/using-dogs-to-detect-covid-19 https://bmcinfectdis.biomedcentral.com/articles/10.1186/s12879-020-05281-3