Mental health should be weighted as heavily as physical disease
A large study of vaccinated veterans has surfaced a quiet but consequential truth: the mind and the immune system are not separate territories. Published in JAMA Network Open, the research found that people with psychiatric histories face meaningfully higher rates of COVID-19 breakthrough infection — up to 24% greater risk among older adults — a disparity that places mental illness alongside chronic physical disease as a genuine vulnerability in the body's defenses. The finding invites a reckoning with how public health has long drawn lines between mental and physical health that biology itself does not honor.
- Despite full vaccination, veterans with psychiatric diagnoses were 3% to 24% more likely to contract COVID-19, with the sharpest gaps appearing in adults over 65.
- Substance abuse, psychotic disorders, and bipolar disorder drove the highest risk elevations, suggesting that not all vaccinated people stand on equal immunological ground.
- Researchers cannot yet fully explain the disparity — immune systems may fade faster in psychiatric patients, variants may evade protection more easily, or behavioral patterns tied to certain conditions may increase exposure.
- The scale of risk mirrors that of serious chronic diseases like kidney failure and HIV, forcing a reexamination of who is truly protected and who has been overlooked.
- Study authors are calling for psychiatric patients to be prioritized for booster doses, arguing that mental health must be treated as a primary — not secondary — factor in COVID-19 risk planning.
A study of more than 263,000 vaccinated veterans, published in JAMA Network Open, has found that people with psychiatric histories are significantly more likely to experience COVID-19 breakthrough infections than those without such diagnoses. Researchers at the University of California-San Francisco discovered that just over half the study population carried a psychiatric diagnosis from the previous five years, and among them, 15% developed infections despite full vaccination.
While the overall elevated risk for any psychiatric disorder was modest at 3%, the picture sharpened considerably when broken down by age and diagnosis. Adults 65 and older with substance abuse disorders faced a 24% higher breakthrough risk than unaffected peers; those with psychotic disorders like schizophrenia saw a 23% increase; bipolar disorder added 16%. Younger adults showed smaller but still meaningful gaps, with substance abuse carrying an 11% elevation and anxiety a 4% increase.
Lead author Aoife O'Donovan stressed that standard demographic and medical factors could not account for these disparities. The underlying causes remain partly unresolved — psychiatric conditions may accelerate the fading of vaccine-induced immunity, offer less durable protection against new variants, or correlate with behaviors that increase viral exposure. Earlier UCSF research had already pointed to anxiety and trauma responses as potential drivers of risk-taking behavior.
What makes the findings especially significant is that the elevated risk levels are comparable to those seen with serious chronic physical illnesses like heart disease, kidney disease, and HIV. O'Donovan called for psychiatric patients to be prioritized for booster shots, arguing that mental health deserves the same weight as physical comorbidities in COVID-19 risk assessments. Because the study drew from a veterans population with relatively stable healthcare access, the real-world consequences in the broader public — where psychiatric care is often fragmented — could be considerably more severe.
A large study of vaccinated veterans has found an unexpected vulnerability: people with psychiatric histories are significantly more likely to catch COVID-19 even after being fully inoculated. The finding, published in JAMA Network Open, suggests that mental health conditions may compromise the immune system's ability to sustain protection from the virus, or that certain psychiatric illnesses correlate with behaviors that increase exposure risk.
Researchers at the University of California-San Francisco analyzed data from more than 263,000 veterans who had been fully vaccinated and tested for COVID-19 at least once. Just over half had received a psychiatric diagnosis in the previous five years. Among that group, 15% developed breakthrough infections—cases where the virus took hold despite vaccination. The overall increased risk for people with any psychiatric disorder was modest: 3% higher than those with no psychiatric history. But when researchers stratified the data by age and specific diagnoses, a starker picture emerged.
For adults 65 and older, the disparities were substantial. Those with substance abuse disorders faced a 24% higher risk of breakthrough infection than their peers without psychiatric illness. People with psychotic disorders like schizophrenia showed a 23% increase. Bipolar disorder carried a 16% elevation, adjustment disorder 14%, and anxiety 12%. The pattern held for younger adults too, though the margins were narrower: an 11% increase for those under 65 with substance abuse, 9% for adjustment disorder, 4% for anxiety, and 3% for post-traumatic stress disorder.
Aoife O'Donovan, an associate professor of psychiatry at UCSF and one of the study's lead authors, emphasized that these disparities cannot be explained away by standard demographic factors or existing medical conditions. The question of why remains partly open. One possibility is that psychiatric conditions trigger an immune response that fades faster or more completely than in people without such histories. Another is that vaccination offers less durable protection against emerging variants in this population. A third explanation, supported by earlier UCSF research, points to behavioral factors: people with certain psychiatric conditions, particularly those marked by anxiety or trauma responses, may be more likely to take risks that increase their exposure to the virus.
The magnitude of increased risk is notable because it mirrors what researchers observe with serious chronic diseases. Kidney disease, heart disease, HIV, and lung disease all carry similar or comparable elevations in breakthrough infection risk. This equivalence suggests that mental health should be weighted as heavily as physical comorbidities when assessing who needs additional protection. O'Donovan called for psychiatric patients to be prioritized for booster shots and other preventive measures, treating mental health not as a secondary concern but as a primary factor in COVID-19 risk stratification.
The study drew from the U.S. Department of Veterans Affairs system, a population with relatively good access to both mental health services and vaccination. If the pattern holds in the general population—where psychiatric care is often fragmented and vaccination rates vary widely—the real-world consequences could be more severe. The findings suggest that public health guidance has overlooked a significant vulnerability, one that intersects medicine, behavior, and the biology of immune response in ways that remain incompletely understood.
Citas Notables
Increased breakthrough infections in people with psychiatric disorders cannot be entirely explained by socio-demographic factors or pre-existing conditions— Aoife O'Donovan, UCSF associate professor of psychiatry
Mental health is important to consider in conjunction with other risk factors. Some patients should be prioritized for boosters and other critical preventive efforts.— Aoife O'Donovan
La Conversación del Hearth Otra perspectiva de la historia
Why would a psychiatric condition weaken the immune response to a vaccine that's already in your body?
That's the central mystery here. The researchers aren't claiming they've solved it. But there are a few threads. Chronic stress and certain psychiatric states can suppress immune function generally—that's been documented for decades. So it's plausible that conditions like depression or anxiety could dampen the antibody response or the durability of that response over time.
But these are vaccinated people. The vaccine did its job initially, presumably.
Right. So the question becomes: does the vaccine's protection fade faster in people with psychiatric illness? Or does it fade at the same rate but provide less cushion against new variants? The study can't quite distinguish between those. What it shows is the outcome—more breakthrough infections—not the mechanism.
The behavioral angle seems clearer.
It does. If you have untreated anxiety or trauma responses, you might be more likely to take social risks, to be in crowded spaces, to not isolate when you're sick. That's not a character flaw; it's a symptom. But it would absolutely increase your exposure.
So the solution is just more boosters?
That's what O'Donovan is suggesting, yes. But it's probably more complicated. If the immune suppression is real, boosters help but might not fully close the gap. If it's behavioral, you'd also need better mental health support and access to care.
The study used veterans. Would this hold for civilians?
That's the real question. Veterans have better access to mental health services and vaccination than the general population. If the pattern is this pronounced in that group, it could be worse elsewhere—where psychiatric care is fragmented and people fall through cracks entirely.