Yes, specially trained dogs can smell COVID-19 from human sweat and saliva, detecting the volatile organic compounds (VOCs) associated with the virus, with studies showing promising accuracy, sometimes even rivaling traditional tests, and they can potentially become valuable screening tools. While your pet dog isn't trained for this, it highlights dogs' incredible sense of smell for detecting illness.
The dog standard
All these enhancements mean that dogs can detect very low concentrations of odors associated with COVID infections. “They can detect the equivalent of one drop of an odorous substance in 10.5 Olympic-sized swimming pools,” Dickey said.
Particles from an infected person can move throughout an entire room or indoor space. The particles can also linger in the air after a person has left the room – they can remain airborne for hours in some cases.
If you have COVID-19 and have a pet: Until your symptoms are getting better and you don't have a fever, stay away from everyone, including your pet, except to provide basic care. If you can, have someone else care for your pet. Don't pet, snuggle, or share food or your bed with your pet.
Environmental contamination, handler cues, and study design affect reported accuracy. Dogs respond to illness by intense sniffing, repeated checking, increased proximity, alerting or protective behaviors, and sometimes avoidance. These behaviors reflect detection of disease-related odors and associated human cues.
They Can Smell It
So, if your body changes your scent will too, so that's usually how dogs can tell if you're sick, or even pregnant. Your mood can even change how you smell as well! Some dogs are even trained to become alert dogs because of this incredible sniffing ability.
The 3-3-3 rule for dogs is a guideline for the adjustment period after adoption, outlining three phases: 3 Days (decompression, feeling overwhelmed/scared), 3 Weeks (starting to settle in, learning routine, personality emerges), and 3 Months (feeling secure, bonded, and truly at home). It helps new owners manage expectations and be patient as their rescue dog transitions, emphasizing calm energy, routine, and space in the early days to build trust.
However, studies have shown the virus can last about two days on some fabrics. It's unlikely you'll get COVID from your bedding, though. Just be sure to wash your bedding if you or anyone in your household has COVID, and disinfect your home's surfaces.
You're contagious with COVID-19 from about two days before symptoms start (or before testing positive if asymptomatic) and can remain infectious for up to 10 days, especially if symptoms like fever, cough, or fatigue persist, though contagiousness lessens as symptoms improve and resolve, but some, like the immunocompromised, shed longer.
Thankfully, norovirus does not last long. It generally works its way out in a couple of days. At this time, it isn't known how contagious a dog with norovirus is, but to be safe you should probably keep your pup away from other dogs for up to a week after it has been sick.
Throw out all of the trash.
For anyone who is ill in your home, try dedicating a lined trash can for that one person's use. It's a good idea (and a CDC precaution for all cleaning and disinfecting during a time of virus) to wear gloves when you are removing or handling any trash bags.
The average recovery time for those who have mild or normal cases of COVID-19 or flu is between one and two weeks. If you have COVID-19, the CDC recommends isolation from others until your symptoms are getting better and you are fever-free for 24 hours without the use of fever-reducing medication.
Because the air conditioners in each room are constantly push- ing the air, the airflow carries the virus-laden aero- sol. This aerosol might penetrate wall defects or go through old tunnels to reach other rooms (Figure 3), even nonadjacent rooms that appear to be indepen- dently isolated.
The Power of Scent:
This heightened sense of smell allows them to detect subtle changes in the scents emitted by their owners' bodies when they are sick. Numerous studies have shown that dogs can detect specific odors associated with certain illnesses, such as cancer and diabetes.
Routine testing of pets for SARS-CoV-2 is not currently recommended by veterinary infectious disease experts or public health veterinarians.
Our study provides evidence that SARS-CoV-2 infection can damage the brain as well as the lungs in dogs at early and later stages of infection, suggesting a high potential for a long-lasting COVID-19–like syndrome to develop in affected dogs.
Letting others who could have been exposed to COVID-19 know that you are sick allows them the opportunity to watch for symptoms and get tested.
While the virus that causes COVID-19 and influenza viruses are thought to spread in similar ways, the virus that causes COVID-19 is generally more contagious than influenza viruses. Also, COVID-19 has been observed to have more superspreading events than flu.
In accordance with guidance from the CDC, if you test positive for COVID-19 you should: Isolate for 5 days regardless of vaccination status. Only leave isolation after 5 days if you have no symptoms or your symptoms are improving, including at least 24 hours without a fever.
Use a portable air cleaner or air purifier if you have one
When used properly, air purifiers can help reduce airborne contaminants, including viruses, in a home or confined space.
Even people who are fully vaccinated and boosted should isolate if they have symptoms or test positive. Someone in isolation should: Sleep in a bedroom not used by anyone else. If that's not possible, try to keep as much of a distance as possible between beds.
Cleaning is an important first step to make sure you remove most germs from surfaces in your home. Using household cleaners that contain soap or detergent will remove germs and dirt on surfaces. Cleaning alone removes most harmful viruses or bacteria from surfaces.
The most commonly surrendered dog type is the "pit bull type" (including mixes), often due to negative stereotypes, breed-specific legislation, and high energy levels, followed by other popular breeds like German Shepherds, Huskies, and Labrador Retrievers that may not fit owner lifestyles. Breeds like Staffordshire Bull Terriers (especially mixes) also top surrender lists in some regions like Australia.
Place the back of your hand on the pavement. If you can't keep it there for five seconds, it's too hot to walk your dog. If you didn't know about this rule, chances are your friends don't, either.
The seven second rule. Put the back of your hand on the pavement. If you cannot hold it for seven seconds, it is too hot to walk for your dogs. This rule also applies to dogs riding in the bed of a pickup truck.