A large-scale genetic study involving over one million individuals has found that COVID-19 and anxiety disorders are not merely coincidental companions in illness, but share underlying biological architecture that binds them in a bidirectional relationship. Anxiety appears to increase vulnerability to severe COVID-19, while infection itself may alter the brain and body in ways that generate or deepen anxiety. The research, drawn from four major international genomic initiatives, points toward a more unified understanding of how mental and physical health are woven from the same genetic fabric
Study finds bidirectional genetic link between COVID-19 and anxiety disorders
COVID-19 patients and those with anxiety disorders face compounded health risks due to bidirectional causal relationships affecting mental and physical health outcomes.
The relationship runs both directions, each amplifying the other.
Mark
Why does it matter that the link is genetic rather than just psychological—couldn't stress alone explain why anxious people get sicker?
Mimi
Genetics tells us something deeper. Yes, stress matters. But if the same DNA variations that increase anxiety also increase COVID-19 risk, that suggests they're affecting the same biological systems—maybe immune function, maybe how the lungs respond to infection. It's not just in your head.
Mark
You said the relationship goes both ways. How does COVID-19 actually cause anxiety if it's a respiratory virus?
Mimi
The virus itself might trigger inflammation that reaches the brain. Or hospitalization—the trauma, the isolation, the fear—could rewire stress responses. The genetic data shows these pathways exist; it doesn't yet explain the exact mechanism, but it proves the connection is real.
Mark
The study looked at over a million people. Does that mean these findings apply to everyone?
Mimi
Not quite. The researchers excluded people of European ancestry to avoid bias in their genetic analysis, which means the findings are strongest for other populations. But the scale—over a million individuals—does give us confidence the patterns are real, not statistical flukes.
Mark
If anxiety makes COVID worse, what should someone with an anxiety disorder actually do differently?
Mimi
That's the question the research raises but doesn't yet answer. It suggests anxiety management might belong in COVID-19 treatment plans, not as an afterthought but as part of the core strategy. But this is preliminary work. We need clinical trials to know what actually helps.
Mark
What about people who had COVID and then developed anxiety? Is that just the trauma talking?
Mimi
Possibly. But the genetic evidence suggests something more biological is happening too. The infection may be triggering anxiety through shared genetic pathways involving brain structure and immune function. Trauma and biology aren't separate—they're intertwined.
Le Pouls
- A bidirectional causal relationship between COVID-19 and anxiety disorders has been identified in genetic data, meaning each condition can worsen the other in measurable, biological ways.
- The study found over 500 genetic correlations within a single genomic region, implicating shared pathways involving lung function, brain structure, cholesterol levels, and behavioral traits like smoking and drinking.
- Specific physical symptoms — muscle tightness during worry linked to COVID-19 positivity, sleep disruption during anxiety linked to hospitalization — suggest the genetic overlap has real, embodied consequences.
- Generalized anxiety disorder emerged as the single most influential anxiety trait affecting COVID-19 outcomes, raising urgent questions about whether untreated anxiety is a hidden risk factor in pandemic health.
- Because the study is a preprint and has not yet been peer-reviewed, its findings remain preliminary — but they are already reshaping how researchers think about integrating mental health care into COVID-19 treatment and recovery.
A large-scale genetic study involving over one million individuals has found that COVID-19 and anxiety disorders are not merely coincidental companions in illness, but share underlying biological architecture that binds them in a bidirectional relationship. Anxiety appears to increase vulnerability to severe COVID-19, while infection itself may alter the brain and body in ways that generate or deepen anxiety. The research, drawn from four major international genomic initiatives, points toward a more unified understanding of how mental and physical health are woven from the same genetic fabric — and how treating one may be inseparable from treating the other.
Researchers have found evidence that COVID-19 and anxiety disorders share genetic machinery — and that the relationship between them runs in both directions. The findings, posted to the medRxiv preprint server in 2023, suggest that anxiety can increase a person's vulnerability to severe COVID-19, while infection may in turn trigger or worsen anxiety symptoms.
The study drew on genetic data from over one million individuals across four major research initiatives, including the UK Biobank and the SARS-CoV-2 Host Genetics Initiative. Using genome-wide association studies, researchers mapped where in the human genome these connections appear. They found that COVID-19 outcomes showed a substantial genetic causal effect on anxiety symptoms, while anxiety-related traits also showed evidence of influencing COVID-19 severity. Specific physical symptoms reinforced the link: COVID-19 positivity was genetically tied to muscle tightness during worry, and hospitalization was associated with sleep disruption during anxious episodes.
The overlapping genetic regions connected to a wide range of other traits — lung function, grey matter volume in a part of the cerebellum involved in emotional processing, education level, smoking and drinking habits, and blood cell characteristics. Within one genomic region alone, researchers identified over 500 genetic correlations. The picture that emerged was not of a single culprit but of many small genetic effects operating across multiple biological systems simultaneously.
Generalized anxiety disorder proved to be the most influential anxiety trait in relation to COVID-19 outcomes. The researchers noted that worse COVID-19 outcomes — including hospitalization and severe respiratory disease — appeared capable of affecting anxiety severity in return. Though the work has not yet been peer-reviewed and should not guide clinical decisions, it points toward a more integrated model of illness — one in which mental health screening and support may need to become central features of both COVID-19 prevention and recovery.
A team of researchers has uncovered evidence that COVID-19 and anxiety disorders are linked not by coincidence but by shared genetic machinery—and that the relationship runs both directions. The findings, posted to the medRxiv preprint server in 2023, suggest that anxiety can make someone more vulnerable to severe COVID-19, while COVID-19 infection itself may trigger or worsen anxiety symptoms.
The study drew on genetic data from over one million individuals across four major research initiatives: the UK Biobank, the FinnGen Project, the Million Veteran Program, and the SARS-CoV-2 Host Genetics Initiative. Researchers used genome-wide association studies to map where in the human genome these connections might live. They looked at anxiety using a standard two-item screening tool and examined how genetic variations associated with anxiety also appeared in people with COVID-19 infection, hospitalization, and severe respiratory disease.
What emerged was a pattern of bidirectional influence. When researchers applied statistical techniques designed to detect causality, they found that COVID-19 outcomes appeared to have a substantial genetic causal effect on anxiety symptoms. But anxiety disorders also showed evidence of causal influence on COVID-19 outcomes—a gcp value of 0.4, suggesting that anxiety-related traits may increase someone's risk of worse COVID-19. The connection showed up in specific physical symptoms too: COVID-19 positivity was genetically linked to muscle tightness and pain during periods of worry, while hospitalization was associated with sleep disruption during anxious episodes.
The researchers identified multiple genetic locations where COVID-19 and anxiety appeared to share causal pathways. These overlapping regions also connected to other traits and conditions: lung function, brain structure (specifically grey matter volume in a part of the cerebellum involved in emotional processing), education level, smoking and drinking habits, and blood cell characteristics like platelet count. Within one particular genomic region, researchers found over 500 genetic correlations, with the strongest connections to cholesterol levels and growth factors. The picture that emerged was not of a single genetic culprit but of many small genetic effects working together across multiple biological systems.
The implications cut both ways. Anxiety disorders may prime the immune system or body's stress response in ways that make severe COVID-19 more likely. Conversely, the infection itself—or the trauma of hospitalization—may alter brain function in ways that produce or intensify anxiety. The researchers noted that worse COVID-19 outcomes, including hospitalization and severe respiratory disease, appeared capable of affecting anxiety severity. Four different anxiety-related traits showed evidence of influencing COVID-19 outcomes, with generalized anxiety disorder itself emerging as the most influential.
It is important to note that this research has not yet undergone peer review. The findings are preliminary and should not be treated as definitive guidance for clinical practice. But the work points toward a more integrated understanding of how mental and physical health intersect during and after COVID-19. If anxiety genuinely increases COVID-19 risk through genetic pathways, then mental health support might need to become a more central part of COVID-19 prevention and treatment strategies. And if COVID-19 can trigger anxiety through shared genetic mechanisms, then mental health screening and intervention may be equally important for people recovering from the infection.
Citations marquantes
Anxiety disorders may increase susceptibility to COVID-19, while COVID-19 outcomes may contribute to anxiety-related behavioral symptoms.— Study findings
Genetic effects shared with risk factors may be critical in the association between COVID-19 and anxiety, involving lung function, brain morphology, education level, and substance use patterns.— Researchers
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