Take-Home Exposure Claims: Kuciemba and Employee Household Members
An employee’s spouse or child who gets sick from something the employee brought home from work can sue the employer directly, and workers’ compensation won’t block the claim. For COVID-19, though, the California Supreme Court held in 2023 that employers owe household members no duty of care to prevent the virus’s spread. That no-duty rule is the main defense to take-home COVID claims. For asbestos and other hazards carried home on clothing, the duty still exists, and the defense moves to breach and causation.
What did the court decide in Kuciemba?
Two things: workers’ compensation doesn’t bar a spouse’s own take-home illness claim, but employers owe no duty to prevent COVID-19 from reaching employees’ households.
The Ninth Circuit asked both questions in a case brought by a construction worker’s wife. According to the opinion, the complaint alleged that the employer moved workers who may have been exposed to the virus onto the husband’s jobsite without the precautions a San Francisco health order required, that the husband became infected, and that he carried the virus home to his wife, who was hospitalized for weeks. Those were allegations, taken as true only for purposes of the certified questions.
The court’s answers, in the conclusion of Kuciemba v. Victory Woodworks, Inc. (2023) 14 Cal.5th 993, were that “the derivative injury rule of California’s workers’ compensation law does not bar a spouse’s negligence claim against the employer,” and that “An employer does not owe a duty of care under California law to prevent the spread of COVID-19 to employees’ household members.”
Why doesn’t workers’ compensation exclusivity bar the household member’s claim?
Because the family member is suing for their own injury, not for a loss that depends on the employee’s injury.
Workers’ compensation is the exclusive remedy of the employee and the employee’s dependents against the employer for a covered injury, and it also bars third-party claims that are collateral to or derivative of the employee’s injury. The court listed the classic derivative claims: heirs suing for an employee’s wrongful death, a spouse’s loss of consortium, and a family member’s emotional distress from witnessing the employee’s injury.
A take-home illness claim is different. The test isn’t whether the employee’s exposure was a “but for” link in the chain. The court explained that “Because Corby’s negligence claim does not require that she allege or prove that Robert suffered any injury, it is not barred by the derivative injury rule.” An employer can’t defeat a household member’s illness claim by pointing to the employee’s own workers’ compensation case.
That doesn’t mean exclusivity is useless in these cases. The employee’s own claims, and any loss of consortium claim the spouse adds based on the employee’s illness, still fall within the workers’ compensation system. In Kuciemba itself, the husband had filed a workers’ compensation claim for his own illness and brought only a consortium claim in the lawsuit.
Why did the court refuse to recognize a duty for COVID-19?
Because the policy costs of the duty outweighed foreseeability, mainly the size of the potential plaintiff pool and the difficulty of proving where an infection came from.
The court began with Civil Code section 1714, the default rule that everyone owes ordinary care, and agreed that household transmission was foreseeable. It then applied the Rowland policy factors and carved out an exception. A duty to prevent household COVID-19 infections, the court said, “would throw open the courthouse doors to a deluge of lawsuits that would be both hard to prove and difficult to cull early in the proceedings.”
The court’s reasoning also gives employers useful language about causation. It agreed with the employer that the connection between workplace negligence and a household infection was somewhat attenuated, given that an employee could pick up the virus while commuting, shopping, or at work without any fault by the employer, and that tracing an infection is especially hard on jobsites shared by several contractors. Those points went to duty in Kuciemba, but they’re the same points a defense would make on causation in any contagious-disease case.
Do employers still owe a duty for other take-home exposures?
Yes, at least for hazardous substances carried home on workers’ clothing. That rule comes from the court’s earlier asbestos decision, Kesner v. Superior Court (2016) 1 Cal.5th 1132.
Kuciemba didn’t disturb Kesner. As Kuciemba described it, Kesner recognized a duty to prevent take-home asbestos exposure and “determined it was sensible, in that context, to limit the duty to prevent take-home asbestos exposure to household members only.” The difference was scale: asbestos users were a small pool of defendants, and the injury required sustained contact, while a COVID-19 duty would have made every California employer a potential defendant.
Employers that work with lead, silica, pesticides, solvents, or other substances that can travel home on skin, clothing, or vehicles should assume a Kesner-style duty applies. The defense in those cases is about the precautions actually taken (changing areas, laundering, decontamination, training) and about whether the household member’s illness really came from that workplace.
| Claim by a family member | Workers’ comp exclusivity | Duty of care | Where the defense usually focuses |
|---|---|---|---|
| Loss of consortium from the employee’s workplace injury | Barred as derivative | Not reached | Exclusivity |
| Wrongful death of the employee, brought by heirs | Barred as derivative | Not reached | Exclusivity |
| Household member’s own COVID-19 illness | Not barred | No duty under Kuciemba | Demurrer or motion on duty |
| Household member’s own illness from asbestos carried home | Not barred | Duty to household members under Kesner | Breach, causation, and who counts as a household member |
| Household member’s own illness from another contagious disease | Likely not barred | Undecided | Duty under the Rowland factors, then causation |
What did Kuciemba leave open?
More than its headline suggests. The holding is about COVID-19 and about household members, and the court said so.
The court limited the question it answered to employees’ households and stated that “we express no view on the propriety of recognizing a duty beyond this limited context,” according to the opinion. It didn’t reach premises liability. It declined to decide whether a local emergency health order could itself create a tort duty to household members. And it acknowledged that conditions around the virus keep changing, writing, “We acknowledge that the calculus might well be different in the future.”
For employers, the practical reading is that Kuciemba is a strong defense to the claim it addressed and an argument, not a rule, for anything else. A plaintiff suing over a different contagious disease, or over a non-household contact, will argue that Kuciemba’s policy balance doesn’t apply. Its reasoning about untraceable infections and an unmanageable pool of claimants carries over well, and a defense should use it, but it isn’t binding on those facts.
Steps to take after a take-home exposure claim
- Preserve the records under a litigation hold once a claim arrives: exposure and air monitoring data, safety and hygiene programs, training records, health order compliance logs, the employee’s workers’ compensation file, and emails and texts about the exposure or outbreak.
- Calendar the response date on the demand or summons, check whether the employer’s general liability, EPLI, or workers’ compensation and employer’s liability policies have notice requirements, and send notice to every carrier that might respond.
- Identify the witnesses who know what precautions were in place, and treat the employee’s own role carefully, since they’re often a witness for the family member and a current employee at the same time.
- Pull the documents the claim turns on: what substance or illness is alleged, when and how the employee was exposed, what other exposures the household had, and which claims depend on the employee’s own injury.
- Talk to a lawyer before responding, contacting the family member or their lawyer, discussing the claim with the employee, or offering anything to settle.
A family member’s illness claim is usually decided first on duty and exclusivity, and employment defense for California employers facing third-party injury claims starts by sorting each claim into the right category. Employers facing related negligence theories may also find the firm’s posts on negligent hiring and retention claims and Cal/OSHA serious injury reporting useful.
FAQ
Can an employee’s spouse sue the employer for COVID-19 they caught from the employee?
They can file, but California law gives the employer a strong defense. Kuciemba held that employers owe no duty of care to prevent the spread of COVID-19 to employees’ household members. Without a duty, a negligence claim fails, and the issue can often be raised at the pleading stage rather than after expensive discovery about where the infection came from.
Does workers’ compensation protect the employer from a family member’s illness claim?
Only for derivative claims. Loss of consortium and wrongful death claims that depend on the employee’s injury are barred by workers’ compensation exclusivity. A family member’s claim for their own illness, such as one caught from the employee or from substances carried home, isn’t barred, because it doesn’t require proof that the employee was injured.
Does Kuciemba apply to illnesses other than COVID-19?
Not directly. The holding addresses COVID-19 and household members only, and the court expressly declined to address a broader duty. For hazardous substances like asbestos, the earlier Kesner decision recognizes a duty to household members. For other contagious diseases, an employer’s defense will rely on Kuciemba’s reasoning about untraceable infections and an unmanageable pool of claimants.
What records help defend a take-home exposure claim?
Records showing what the employer did to control the exposure carry the most weight: monitoring data, hygiene and decontamination procedures, training logs, and compliance with any health or safety orders in force at the time. Records showing other possible sources of the household member’s illness matter too, because causation is often the hardest element for the plaintiff to prove.
If a family member has sued your company over an illness brought home from work
If your company has received a demand or lawsuit from an employee’s spouse, child, or other household member over an illness or exposure tied to your workplace, sorting derivative claims from independent ones, and testing duty early, usually decides how expensive the case becomes. Rosenberger + Kawabata represents employers defending employment lawsuits and claims through its business litigation practice, including claims by employees’ family members over take-home illness and exposure. Contact Rosenberger + Kawabata online for a confidential consultation, or call (310) 894-6921.
Sources
Kuciemba v. Victory Woodworks, Inc. (2023) 14 Cal.5th 993; Civil Code section 1714; Labor Code section 3602.
This post is general information about California and federal employment law as of November 7, 2026. It is not legal advice, and reading it does not create an attorney-client relationship. Employment statutes, regulations, and court decisions change often, and the outcome of any claim depends on its facts. Past results do not guarantee future outcomes.