Yes, you can sue someone for getting you sick, but winning that lawsuit is a different question. The legal path exists under negligence, intentional conduct, or product liability theories, depending on how you were exposed. The hard part is almost never finding a theory to sue under. It’s proving that this specific person or business caused your illness rather than one of the other places you could have picked it up.
The Legal Theories That Apply
Most illness lawsuits are built on negligence. You have to show the defendant owed you a duty of care, breached it, caused your illness, and that you suffered real harm.1Legal Information Institute. Negligence People have a general obligation not to act in ways that foreseeably harm others, so someone who knows they’re contagious and chooses to expose you has arguably breached that duty. A restaurant that ignores food safety protocols has breached it more clearly.
A related doctrine called negligence per se can simplify things. If the person or business that got you sick was violating a health or safety regulation, the violation itself can establish the breach, as long as the regulation was designed to prevent the kind of harm you suffered and you’re the type of person it was meant to protect.2Legal Information Institute. Negligence Per Se A restaurant cited for storing meat at unsafe temperatures during the same week you ate there and got food poisoning is a textbook fit.
Intentional Exposure
When someone deliberately gets you sick, the theory shifts from carelessness to intentional harm. The clearest examples involve sexually transmitted infections. Courts have allowed lawsuits under negligence, battery, and fraud theories when someone knew they carried an STI and either failed to disclose it or lied about their status. Battery applies because proceeding with contact while concealing a known infection negates meaningful consent. Fraud applies when someone affirmatively lies about their health.
Intentional exposure claims also come up in less dramatic settings. Someone who deliberately coughs or spits on another person while knowingly contagious could face both civil liability and criminal charges. The burden is higher than in a negligence case because you need evidence of intent, not just carelessness. Text messages, social media posts, and witness testimony showing the person knew they were sick and chose to expose you anyway often decide these claims.
Contaminated Food and Products
Foodborne illness is one of the more winnable scenarios, because strict liability shifts the burden. In most jurisdictions, a business that sells a contaminated food product is liable for the resulting illness even if it exercised reasonable care in preparing the product.3United States Department of Agriculture. Product Liability and Microbial Foodborne Illness You don’t need to identify where the safety procedures failed. You need to show the food was contaminated and that eating it caused the illness.
Strict liability applies to everyone in the commercial chain: manufacturer, distributor, and retailer. If a packaged salad mix contaminated with E. coli makes you sick, the farm, the packager, and the grocery store are all potential defendants. Courts recognize three main theories: manufacturing defect, design defect, and failure to warn.
Restaurant cases often combine strict liability with ordinary negligence. A health department inspection revealing code violations around the time customers fell ill does double duty, supporting both a strict liability claim based on the defective product and a negligence per se claim based on the regulatory violation.
Proving Who Actually Made You Sick
Causation is where illness lawsuits get difficult, and this is where most of them fail. You need to establish both actual causation (your illness would not have happened without the defendant’s actions) and proximate causation (your illness was a foreseeable result of what they did).4Legal Information Institute. Cause
The problem is that most common illnesses have multiple possible sources. Catch the flu after attending a party with a visibly sick host, and you also could have been exposed at the grocery store that morning, on the bus the day before, or by a family member who wasn’t yet showing symptoms. The CDC has acknowledged that source identification is difficult even in formal outbreak investigations, where patients may be misclassified due to poor memory, language barriers, multiple transmission routes, or background cases of the same disease unrelated to the outbreak being investigated.5Centers for Disease Control and Prevention. Outbreak Investigations – A Perspective If trained epidemiologists struggle with this, an individual plaintiff faces an even steeper climb.
Expert testimony is almost always necessary. A medical professional or epidemiologist can explain the illness, its incubation period, and whether the timeline matches your exposure to the defendant. Scientific evidence like genetic sequencing or contact tracing can establish a biological link. Even so, laboratory work is often not detailed enough to tie the pathogen in a patient to the specific strain found on a defendant’s premises.
The civil standard is lower than most people assume. You only need to show your version is more likely true than not, a standard called preponderance of the evidence, meaning the scale tips just past 50%.6Legal Information Institute. Preponderance of the Evidence When illness could have come from anywhere, even that lower bar is hard to clear.
When Causation Is Easier
Some fact patterns make the problem manageable. Foodborne outbreaks traced to a single restaurant, where multiple diners got sick from the same pathogen in the same window, are far stronger than one-on-one transmission claims. STI cases where you have a clean test before contact and a positive test after create a clean timeline. Workplace exposure where an employer ignored a known outbreak and multiple employees fell ill provides the kind of statistical pattern courts respond to.
The weakest cases involve common respiratory illnesses with short incubation periods and many possible sources. If you’re thinking about suing over a cold or flu caught in an everyday social setting, expert fees will likely cost more than the case can produce.
What You Can Recover
Damages fall into two categories. Economic damages cover tangible losses: medical bills, prescription costs, lost wages, and any future medical treatment or lost earning capacity. Non-economic damages compensate for pain, emotional distress, and diminished quality of life.
Serious illnesses that cause hospitalization, long recovery, or permanent harm produce higher awards. A mild bout of food poisoning that clears in two days may produce real damages of only a few hundred dollars, which is why attorneys rarely take those cases on contingency.
Punitive damages are available in some cases but require proof beyond ordinary negligence. Courts typically reserve them for defendants who acted intentionally or with willful and wanton disregard for others’ safety.7Legal Information Institute. Punitive Damages Someone who knowingly concealed an STI diagnosis, or a company that kept selling a product after internal testing revealed contamination, could face punitive damages. A coworker who came to work with a cold would not.
If You Got Sick at Work
Workplace illness has its own rules, and they usually cut against suing. Employers do have a legal obligation under the Occupational Safety and Health Act to provide a workplace free from recognized hazards likely to cause serious physical harm, and that general duty clause reaches infectious disease risks.8Occupational Safety and Health Administration. OSH Act of 1970 – Section 5 Duties But most employees cannot sue their employer directly for a workplace illness. Workers’ compensation is typically the exclusive legal remedy for job-related injuries and illnesses. You get medical costs and partial lost wages covered without proving fault; in exchange, you give up the right to sue for pain and suffering.
Exceptions exist in most states for employer conduct that goes beyond negligence, such as intentional harm or fraudulent concealment of a known hazard. If your employer knew about an outbreak, deliberately hid it, and you got sick as a result, you may have grounds to step outside the workers’ compensation system. An OSHA citation for violating sanitation standards or failing to address a recognized hazard can serve as evidence that the employer knew or should have known about the risk.9Occupational Safety and Health Administration. Employer Responsibilities
Non-employees harmed by workplace conditions, such as a customer who got sick at a business, don’t face the workers’ compensation barrier at all. A negligence or negligence per se claim can proceed directly.
Don’t Wait Too Long to Decide
Every state imposes a deadline for filing a personal injury lawsuit, called a statute of limitations. These range from one to six years depending on the state and the type of claim. Miss the deadline and the case is dead regardless of its merits.
Illness cases carry a wrinkle. Many infections have incubation periods, and some illnesses don’t produce symptoms for weeks or months after exposure. Most states apply a discovery rule in these situations: the limitations period begins when you knew or reasonably should have known that you were injured and that someone else’s conduct may have caused it. The “reasonably should have known” piece matters. Courts expect you to investigate suspicious symptoms rather than ignore them, and the clock starts when a reasonable person in your position would have connected the illness to the exposure.
Deadlines vary enough, and the discovery rule applies differently enough, that checking your state’s specific limitations period early is the one piece of advice here that’s genuinely time-sensitive. Waiting to see how your health develops is understandable, and it can quietly eliminate your legal options.