Contagion from a sexually transmitted disease can leave, alongside health consequences, a difficult question to address: can the person who transmitted the infection be held liable for damages? I will explain which elements make a claim possible and why neither the diagnosis alone nor the fact that the relationship was consensual is sufficient.
It is important to understand whether the other person was aware of their condition or had concrete elements not to ignore it, whether they concealed a relevant risk, and whether the contagion can be linked precisely to that conduct. We will also examine which damages can be included in the claim, which evidence plays a real role, and why it is prudent not to wait too long before taking action.
When contagion can establish a compensation claim
The starting point is the wrongful act. Article 2043 of the Italian Civil Code requires anyone who causes unfair damage to others through intentional or negligent conduct to compensate it. Applied to contagion, this means that culpable conduct, actual damage, and a causal link between that conduct and the infection must emerge. The general reference is in the Civil Code, under the rules governing wrongful acts.
The consensual relationship does not resolve the issue. Consenting to sexual intercourse does not automatically equate to accepting a risk of contagion that the other person, aware of their infection or concrete exposure, has concealed. However, omitted information does not produce compensation on its own: it must be proven that the silence or other imprudent conduct played a causal role in the infection and that the behavior was attributable to the person indicated as responsible.
Knowledge of the condition is a decisive fact. The case of someone who was already informed by diagnoses, tests, therapies, or healthcare communications and continues relations without disclosing the risk is different from someone who did not know they were infected. In the second case, liability does not arise automatically: it is necessary to understand whether elements existed such as to make the lack of caution culpable. A review by the Italian Court of Cassation recalls cases in which awareness of HIV-positivity and conduct aimed at keeping the partner in the dark were relevant in criminal assessment: this is a useful indication of the centrality of concrete facts, not a rule that replaces proof in the individual case. Review by the Court of Cassation on HIV contagion and the subjective element.
What must be proven
The diagnosis proves the infection, but does not identify on its own who transmitted it. A health certification can document the existence of the pathology, treatments, and any aftereffects. For a compensation claim, however, it is also necessary to reconstruct the causal nexus: in simple terms, to prove that the contagion derives with adequate probability from that relationship or relationships and not from another possible source.
The causal nexus requires a coherent reconstruction. The chronology of relations, the timing of tests, any previous checks, available health information, and elements that exclude or diminish alternative sources can assume relevance. There is no "magic" proof: messages, statements, or admissions can help reconstruct the awareness of the risk, but they do not replace medico-legal assessment when it is necessary to establish the origin, course, and consequences of the infection.
The injured party's conduct can also be discussed, but it does not erase the other party's facts. The counterpart may argue that the risk was known, that precautions had been adopted, or that there were other potentially relevant relations. These circumstances must be carefully distinguished: a generic statement about private life is not enough to exclude the causal nexus, while documented facts genuinely compatible with the contagion can affect the reconstruction and, in some cases, the extent of compensable damage.
Confidentiality deserves protection right from the start. The need to prove the facts does not authorize the indiscriminate dissemination of diagnoses, conversations, or intimate data. Health documents and personal communications must be used for the purpose strictly necessary to protect the right. Avoiding social media publications, public confrontations, or unverified accusations protects both personal dignity and the solidity of the future factual reconstruction.
What damages can be claimed
Biological damage concerns the injury to health. If the infection has produced temporary or permanent impairment, the damage to health is assessed based on its actual consequences: therapies, symptoms, daily limitations, clinical prospects, and aftereffects. It does not depend solely on the name of the pathology; what matters is how it concretely affects the person's psychophysical integrity.
Personal prejudice does not coincide with an automatic sum. Contagion can affect serenity, relational life, sexuality, family plans, and psychological balance. These consequences may be relevant under non-pecuniary damage, governed by Article 2059 of the Italian Civil Code, but they must be alleged and proven without duplicating the same suffering under different labels. The Civil Code, in Articles 2056 and 2059, links compensation to the direct consequences of the act and regulates non-pecuniary damage.
Financial losses require a precise connection. Medical expenses, assistance costs, uncovered treatments, necessary travel, and loss or reduction of income can be claimed if they are a consequence of the infection and are documented. A receipt proves an outlay, but it is also necessary to explain why that expense was necessary due to the contagion. The same applies to occupational damage: it is not enough to indicate a difficult period, the relationship between the pathology and concrete financial loss is required.
Civil compensation and possible criminal relevance
Civil and criminal protection are not the same thing. The civil claim aims to obtain financial repair for harmful consequences; criminal proceedings instead serve to ascertain whether a crime has been committed and to identify any personal liability. A compensation claim can be brought even without basing all protection on a criminal trial, while any criminal proceeding may offer useful elements for reconstruction but does not replace the proof of civil damage.
Contagion can assume relevance as personal injury, but qualification depends on the facts. Article 582 of the Italian Criminal Code concerns anyone who causes an injury from which a disease in the body or mind derives. Severity, psychological element, awareness of the risk, subsequent conduct, and circumstances of the relationship affect concrete qualification; it is incorrect to transform every contagion into an already ascertained crime. The current text of Article 582, as amended in procedural rules, is reported in Legislative Decree no. 150 of 2022 published on Normattiva.
Time can change protection possibilities. For extra-contractual liability, Article 2947 of the Italian Civil Code generally provides for a limitation period of five years; however, the discipline contains special rules when the act is provided for by law as a crime. In cases of contagion, establishing when the term starts running may require distinguishing between the onset of symptoms, diagnosis, knowledge of the damage, and the possibility of linking it to another person's conduct. For this reason, it is not prudent to independently calculate a deadline starting solely from the date of a relationship or an examination. Civil Code, Article 2947 on the statute of limitations for compensation from a wrongful act.
What elements should be kept
Health documentation is the basis of the claim. Reports, diagnoses, prescriptions, tests, medical records, treatment receipts, and certificates of absences related to the illness help reconstruct both the contagion and the consequences on health. It is important to keep documents in their original form and maintain a simple chronology: date of the exam, outcome, visit, therapy, and clinical variation.
Communications are useful only for what they demonstrate. Messages or emails can be relevant if they contain information on knowledge of the illness, requests for tests, admission of relations, or the willingness not to inform the other person. Conversations that are extrapolated, altered, or collected in violation of others' rights can instead create problems. In an initial consultation, it is useful to bring a few orderly materials, without accusatory reconstructions or unnecessary details: the question to clarify is which facts can be proven and what legal consequence derives from them.
Alternatives to consider before taking action
An out-of-court claim can clarify positions and liabilities. When the reconstruction is already sufficiently founded, a written dispute can indicate the fact, known damages, and the request for redress. It is not a purely formal step: it must be consistent with available documentation and must not anticipate accusations that cannot be supported. A settlement proposal can be considered only if it defines precisely what it covers and what effects it produces.
Civil litigation becomes central if there is no agreement or the causal nexus is contested. In that venue, medico-legal assessments, testimonies, and documents may be necessary to evaluate the origin of the infection and harmful consequences. The alternative is not simply "sue or give up": in some cases, the core issue is primarily medical and evidentiary, because a serious claim must distinguish what is certain, what is plausible, and what remains to be proven.
The priority remains health protection. Assessments and treatments must not be postponed for reasons related to the dispute. Updated clinical information can also be important legally, but its primary function is to allow the person to receive adequate assistance and understand their health status.
Frequently asked questions
Can I claim compensation if my partner did not tell me they had an STD?
You can evaluate it, but silence alone is not enough. It is necessary to prove the infection, the connection between contagion and relations with that person, as well as intentional or negligent conduct. Knowledge of the diagnosis, the existence of previous tests, any communications, and clinical chronology can make the claim more or less founded.
Must I prove with absolute certainty who infected me?
Absolute certainty is not required in civil proceedings. Causation is assessed on the balance of probabilities, considering the evidence in the individual case and alternative explanations: discovering the infection after a relationship is not enough by itself. Medical data, timing, relevant contacts and medico-legal assessment can clarify its origin. The Court of Cassation’s civil review distinguishes this standard from the proof required in criminal proceedings.
What damages are included in compensation?
Consequences effectively caused by the contagion are included. They may comprise biological damage to health, non-pecuniary reflections on personal and relational life, and documented financial losses, such as treatments and necessary expenses. The various heads of damage do not add up automatically: each must correspond to real, non-duplicated prejudice.
Can I take action even if the relationship was consensual?
Yes, consent to the relationship does not in itself exclude protection. The question is whether there was conscious acceptance of the risk of contagion or whether the risk was concealed or created through imprudent conduct. Proof of infection, causal nexus, and the other person's liability remain indispensable.
If years have passed since the diagnosis, is it too late?
One cannot answer by looking solely at the years elapsed. Civil prescription has general rules and possible particularities, especially if the fact can be qualified as a crime. One must reconstruct precisely when you learned of the damage and when it was possible to link it to a specific cause, without waiting further if the deadline might be close.
Putting order among health, evidence, and protection
A reliable claim stems from orderly facts, not generic accusations. Diagnosis and treatment come first; immediately afterwards, it becomes useful to preserve health documentation and materials that can clarify risk knowledge, chronology, and concrete consequences. If you want to understand whether available elements can support a compensation claim, you can contact me.