Australia loves dogs. We have one of the highest rates of pet ownership in the world, and one in two households has at least one dog.

But are they good for our health?

Mental health is the second-most common reason cited for getting a dog, after companionship. And many of us say we “feel healthier” for having a dog – and let them sleep in our bedroom.

Here’s what it means for our physical and mental health to share our homes (and doonas) with our canine companions.

Are there physical health benefits to having a dog?

Having a dog is linked to lower risk of death over the long term. In 2019, a systematic review gathered evidence published over 70 years, involving nearly four million individual medical cases. It found people who owned a dog had a 24% lower risk of dying from any cause compared to those who did not own a dog.

Dog ownership was linked to increased physical activity. This lowered blood pressure and helped reduce the risk of stroke and heart disease.

The review found for those with previous heart-related medical issues (such as heart attack), living with a dog reduced their subsequent risk of dying by 35%, compared to people with the same history but no dog.

Another recent UK study found adult dog owners were almost four times as likely to meet daily physical activity targets as non-owners. Children in households with a dog were also more active and engaged in more unstructured play, compared to children whose family didn’t have a dog.

Exposure to dirt and microbes carried in from outdoors may also strengthen immune systems and lead to less use of antibiotics in young children who grow up with dogs.

Health risks

However, dogs can also pose risks to our physical health. One of the most common health issues for pet owners is allergies.

Dogs’ saliva, urine and dander (the skin cells they shed) can trigger allergic reactions resulting in a range of symptoms, from itchy eyes and runny nose to breathing difficulties.

A recent meta-analysis pooled data from nearly two million children. Findings suggested early exposure to dogs may increase the risk of developing asthma (although not quite as much as having a cat does). The child’s age, how much contact they have with the dog and their individual risk all play a part.

Slips, trips and falls are another risk – more people fall over due to dogs than cats.

Having a dog can also expose you to bites and scratches which may become infected and pose a risk for those with compromised immune systems. And they can introduce zoonotic diseases into your home, including ring worm and Campylobacter, a disease that causes diarrhoea.

For those sharing the bed there is an elevated the risk of allergies and picking up ringworm. It may result in lost sleep, as dogs move around at night.

On the other hand some owners report feeling more secure while co-sleeping with their dogs, with the emotional benefit outweighing the possibility of sleep disturbance or waking up with flea bites.

Proper veterinary care and hygiene practices are essential to minimise these risks.

What about mental health?

Many people know the benefits of having a dog are not only physical.

As companions, dogs can provide significant emotional support helping to alleviate symptoms of anxiety, depression and post-traumatic stress. Their presence may offer comfort and a sense of purpose to individuals facing mental health challenges.

Loneliness is a significant and growing public health issue in Australia.

In the dog park and your neighbourhood, dogs can make it easier to strike up conversations with strangers and make new friends. These social interactions can help build a sense of community belonging and reduce feelings of social isolation.

For older adults, dog walking can be a valuable loneliness intervention that encourages social interaction with neighbours, while also combating declining physical activity.

However, if you’re experiencing chronic loneliness, it may be hard to engage with other people during walks. An Australian study found simply getting a dog was linked to decreased loneliness. People reported an improved mood – possibly due to the benefits of strengthening bonds with their dog.

What are the drawbacks?

While dogs can bring immense joy and numerous health benefits, there are also downsides and challenges. The responsibility of caring for a dog, especially one with behavioural issues or health problems, can be overwhelming and create financial stress.

Dogs have shorter lifespans than humans, and the loss of a beloved companion can lead to depression or exacerbate existing mental health conditions.

Lifestyle compatibility and housing conditions also play a significant role in whether having a dog is a good fit.

The so-called pet effect suggests that pets, often dogs, improve human physical and mental health in all situations and for all people. The reality is more nuanced. For some, having a pet may be more stressful than beneficial.

Importantly, the animals that share our homes are not just “tools” for human health. Owners and dogs can mutually benefit when the welfare and wellbeing of both are maintained.

Tania Signal, Professor of Psychology, School of Health, Medical and Applied Sciences, CQUniversity Australia

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Nearly five years into the pandemic, COVID is feeling less central to our daily lives.

But the virus, SARS-CoV-2, is still around, and for many people the effects of an infection can be long-lasting. When symptoms persist for more than three months after the initial COVID infection, this is generally referred to as long COVID.

In September, Grammy-winning Brazilian musician Sérgio Mendes died aged 83 after reportedly having long COVID.

Australian data show 196 deaths were due to the long-term effects of COVID from the beginning of the pandemic up to the end of July 2023.

In the United States, the Centers for Disease Control and Prevention reported 3,544 long-COVID-related deaths from the start of the pandemic up to the end of June 2022.

The symptoms of long COVID – such as fatigue, shortness of breath and “brain fog” – can be debilitating. But can you die from long COVID? The answer is not so simple.

How could long COVID lead to death?

There’s still a lot we don’t understand about what causes long COVID. A popular theory is that “zombie” virus fragments may linger in the body and cause inflammation even after the virus has gone, resulting in long-term health problems. Recent research suggests a reservoir of SARS-CoV-2 proteins in the blood might explain why some people experience ongoing symptoms.

We know a serious COVID infection can damage multiple organs. For example, severe COVID can lead to permanent lung dysfunction, persistent heart inflammation, neurological damage and long-term kidney disease.

These issues can in some cases lead to death, either immediately or months or years down the track. But is death beyond the acute phase of infection from one of these causes the direct result of COVID, long COVID, or something else? Whether long COVID can directly cause death continues to be a topic of debate.

Of the 3,544 deaths related to long COVID in the US up to June 2022, the most commonly recorded underlying cause was COVID itself (67.5%). This could mean they died as a result of one of the long-term effects of a COVID infection, such as those mentioned above.

COVID infection was followed by heart disease (8.6%), cancer (2.9%), Alzheimer’s disease (2.7%), lung disease (2.5%), diabetes (2%) and stroke (1.8%). Adults aged 75–84 had the highest rate of death related to long COVID (28.8%).

These findings suggest many of these people died “with” long COVID, rather than from the condition. In other words, long COVID may not be a direct driver of death, but rather a contributor, likely exacerbating existing conditions.

‘Cause of death’ is difficult to define

Long COVID is a relatively recent phenomenon, so mortality data for people with this condition are limited.

However, we can draw some insights from the experiences of people with post-viral conditions that have been studied for longer, such as myalgic encephalomyelitis or chronic fatigue syndrome (ME/CFS).

Like long COVID, ME/CFS is a complex condition which can have significant and varied effects on a person’s physical fitness, nutritional status, social engagement, mental health and quality of life.

Some research indicates people with ME/CFS are at increased risk of dying from causes including heart conditions, infections and suicide, that may be triggered or compounded by the debilitating nature of the syndrome.

So what is the emerging data on long COVID telling us about the potential increased risk of death?

Research from 2023 has suggested adults in the US with long COVID were at greater risk of developing heart disease, stroke, lung disease and asthma.

Research has also found long COVID is associated with a higher risk of suicidal ideation (thinking about or planning suicide). This may reflect common symptoms and consequences of long COVID such as sleep problems, fatigue, chronic pain and emotional distress.

But long COVID is more likely to occur in people who have existing health conditions. This makes it challenging to accurately determine how much long COVID contributes to a person’s death.

Research has long revealed reliability issues in cause-of-death reporting, particularly for people with chronic illness.

So what can we conclude?

Ultimately, long COVID is a chronic condition that can significantly affect quality of life, mental wellbeing and overall health.

While long COVID is not usually immediately or directly life-threatening, it’s possible it could exacerbate existing conditions, and play a role in a person’s death in this way.

Importantly, many people with long COVID around the world lack access to appropriate support. We need to develop models of care for the optimal management of people with long COVID with a focus on multidisciplinary care.

Dr Natalie Jovanovski, Vice Chancellor’s Senior Research Fellow in the School of Health and Biomedical Sciences at RMIT University, contributed to this article.

Rose (Shiqi) Luo, Postdoctoral Research Fellow, School of Health and Biomedical Sciences, RMIT University; Catherine Itsiopoulos, Professor and Dean, School of Health and Biomedical Sciences, RMIT University; Kate Anderson, Vice Chancellor’s Senior Research Fellow, RMIT University; Magdalena Plebanski, Professor of Immunology, RMIT University, and Zhen Zheng, Associate Professor, STEM | Health and Biomedical Sciences, RMIT University

This article is republished from The Conversation under a Creative Commons license. Read the original article.