Is It Illegal to Not Disclose Herpes? US Laws 2026

In many US states, it is illegal to not disclose herpes to a sexual partner before engaging in sexual activity, but the law varies dramatically from state to state. Some states treat it as a felony. Others have no specific criminal statute at all.

This is one of the most misunderstood areas of US law. An estimated 1 in 6 Americans has genital herpes, according to CDC data, yet most people with the diagnosis have no idea what their state actually requires them to disclose, or what happens legally if they don’t.

Both criminal law and civil law apply here, and they work differently. A criminal case is brought by the government. A civil lawsuit is brought by the person who claims they were infected.

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This article covers every major angle of herpes non-disclosure law for 2026, from criminal statutes to civil lawsuits to state-by-state rules to what the reform movement has changed.

Is It Illegal to Not Disclose Herpes

In many US states, it is illegal to not disclose herpes before engaging in sexual contact with a partner who does not know about the diagnosis. The specific laws vary by state, and some states have no criminal statute specifically covering herpes.

The legal basis for these laws comes from two sources. The first is specific STD or communicable disease exposure statutes. The second is general criminal law doctrines like reckless endangerment or assault that courts have applied to STD transmission cases.

Not every state has a law that names herpes specifically. Many states use broader language covering “sexually transmitted diseases” or “communicable diseases,” which courts and prosecutors apply to herpes cases.

Quick Facts:

• Some states criminalize STD non-disclosure with felony charges
• Some states cover it through general reckless endangerment laws
• Some states have no specific criminal statute but allow civil lawsuits
• California reformed its STD criminalization law significantly in 2017
• Disclosure laws apply regardless of whether transmission actually occurs in most states

The critical legal threshold in most state statutes is knowledge. If a person knows they have herpes and engages in sexual activity without disclosing that fact, that is where criminal or civil liability typically begins. Unknowing transmission is treated very differently.

Do You Legally Have to Disclose Herpes

Whether you legally have to disclose herpes before sex depends on which state you live in and the specific language of its laws. There is no single federal law requiring herpes disclosure. The obligation, where it exists, comes from state statutes.

In states with criminal STD exposure or transmission laws, the answer is effectively yes. Engaging in sexual activity while knowingly infected and without disclosing creates criminal liability. In states without such statutes, the obligation is more of a civil one, meaning you may not face criminal charges but can still be sued.

The moral and practical answer is also separate from the legal one. Herpes can transmit even when someone has no visible symptoms. Disclosure protects partners and reduces legal exposure for the person with the diagnosis simultaneously.

States With Explicit STD Disclosure or Exposure Criminal Laws:

States not on this list may still allow civil lawsuits for herpes transmission, even without a specific criminal statute.

Is It Illegal to Not Tell Someone You Have Herpes

Not telling someone you have herpes before sexual contact is illegal in states that have STD non-disclosure or exposure statutes. In those states, the failure to disclose is the offense, and actual transmission does not have to occur for a charge to be filed.

That last point surprises most people. In many states, simply exposing a partner to risk without disclosure is enough. The law does not require proof that the partner actually contracted herpes. The act of engaging in sexual contact while knowingly infected and without informing the partner is the crime.

Florida Statute 384.24 is a clear example. It makes it unlawful for any person knowing they have a sexually transmitted disease to have sexual intercourse with another person unless that person has been informed of the disease. Transmission is not required for the offense.

Disclosure Obligation: Key Legal Points

• Obligation triggered by knowledge of the diagnosis, not symptoms alone
• Disclosure must occur before sexual contact, not after
• Verbal disclosure is typically sufficient but written documentation is safer legally
• In some states, using protection does not eliminate the disclosure obligation
• Some state statutes cover oral sex, anal sex, and vaginal sex separately

The “I used a condom” defense does not eliminate liability in most states with disclosure laws. Condom use may be a mitigating factor in sentencing or civil damages, but it does not satisfy a legal disclosure obligation on its own.

Key Takeaway: In states with STD exposure statutes, failing to disclose herpes before sexual contact is a crime regardless of whether the partner actually contracts the infection. Disclosure must happen before the sexual activity occurs.

Herpes Disclosure Law

Herpes disclosure law in the United States is a patchwork of state criminal statutes, general criminal law applications, and civil tort principles. There is no single federal herpes disclosure law. Each state has developed its own approach.

The earliest STD criminalization laws were enacted in response to concerns about HIV in the 1980s and 1990s. Many were written broadly enough to cover other STDs including herpes. Over time, some states have narrowed or modernized those laws, while others have left older, broader statutes in place.

The 2017 California reform is the most significant recent example. California Senate Bill 239, signed in 2017, reduced the criminal penalty for intentional HIV exposure from a felony to a misdemeanor and changed how the law treats STD exposure more broadly. The reform was driven by public health advocates who argued that criminalization discouraged testing and treatment.

Evolution of STD Disclosure Law in the US:

The reform trend matters for understanding what the law actually looks like in 2026. Some states have criminal herpes disclosure laws unchanged since the 1990s. Others have modernized. Knowing which version your state uses is the starting point.

Is It a Crime to Not Disclose an STD

Not disclosing an STD before sex is a crime in states with specific criminal STD exposure or transmission statutes, and it can also result in criminal charges under general laws like reckless endangerment or criminal assault in states without specific STD statutes.

The crime is typically framed around knowledge and intent. A person who knows they have an STD, does not disclose it, and engages in sexual activity has committed the elements of the offense in states with these laws. The offense does not require the other person to become infected.

Some states specifically require that the person acted “knowingly,” “intentionally,” or “recklessly.” The mental state element is important because it distinguishes someone who had no idea they were infected from someone who was diagnosed and chose to say nothing.

Mental State Requirements in STD Criminal Statutes:

• Knowingly: the person knew of the diagnosis at the time of exposure
• Intentionally: the person specifically intended to expose or infect
• Recklessly: the person disregarded a substantial and unjustifiable risk
• Negligently: the person failed to take reasonable steps, though this is rare in STD law

Iowa’s statute under Code Section 709C.1 is one of the broadest, covering anyone who “exposes another person to a contagious or infectious disease” knowing they have the disease. Iowa classifies this as a Class B felony, one of the most serious classifications in the state.

Criminal Charges for Not Disclosing Herpes

Criminal charges for not disclosing herpes are possible in a significant number of US states under either specific STD exposure laws or general criminal statutes. The specific charge depends on the state, the circumstances, and whether transmission occurred.

In states with specific STD exposure or transmission statutes, the charge is typically filed under that statute. In states without one, prosecutors have charged defendants under laws including reckless endangerment, criminal assault, battery, and even attempted murder in rare extreme cases involving HIV.

For herpes specifically, most prosecutions occur under STD exposure statutes where the state has one. Prosecutions under general criminal laws for herpes alone, without HIV involvement, are less common but documented.

Criminal Charge Types in STD Non-Disclosure Cases:

The “consent vitiated” theory is important. In some states, courts have held that sexual consent obtained without material disclosure of an STD is not valid consent. Under this theory, having sex without disclosing herpes can be charged as sexual battery even when the act appeared consensual on the surface.

Can You Go to Jail for Not Disclosing Herpes

Yes, you can go to jail for not disclosing herpes in states with criminal STD exposure statutes. The sentence depends on the state, the offense classification, and the specific circumstances of the case.

In Iowa, where the offense is a Class B felony under Code Section 709C.1, a conviction carries up to 25 years in prison. That is among the harshest possible penalties in the country for STD non-disclosure. Iowa’s law does not require transmission to have occurred.

In Florida, the offense under Statute 384.24 is a first-degree misdemeanor for a first offense, carrying up to one year in jail. A second violation escalates to a felony.

Potential Jail or Prison Time by State:

California’s sentence dropped significantly after the 2017 reform. Before SB 239, knowingly exposing someone to HIV was a felony in California with up to 8 years in prison. The reform reduced it to a misdemeanor and extended that lighter treatment to other STDs including herpes.

Key Takeaway: Jail time for not disclosing herpes is real and documented in multiple states. Iowa carries the harshest possible penalty at up to 25 years. California reformed its law in 2017 and now treats the offense as a misdemeanor with up to 6 months.

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STD Non-Disclosure Criminal Liability

STD non-disclosure criminal liability refers to the legal exposure a person faces under criminal law for engaging in sexual activity while knowingly infected with an STD without informing their partner. It is distinct from civil liability, which is handled in a separate legal process.

Criminal liability is pursued by the state, not by the infected partner. A district attorney or state prosecutor decides whether to bring charges. The infected partner can report the situation to police, but they do not control whether charges are filed.

The standard of proof in a criminal case is beyond a reasonable doubt, which is a very high bar. Prosecutors must prove that the defendant knew about the diagnosis, did not disclose it, and engaged in sexual activity. Medical records, prior partner communications, and healthcare provider testimony are common evidence types.

Elements Prosecutors Must Prove in STD Non-Disclosure Cases:

• The defendant had actual knowledge of the herpes diagnosis
• The defendant engaged in sexual activity with the complainant
• The defendant did not disclose the diagnosis before sexual contact
• In some states, that the defendant acted with the required mental state (knowingly, intentionally, or recklessly)

The knowledge element is where many cases face challenges. A defendant who claims they did not know they had herpes, or who was never formally diagnosed, may be able to raise reasonable doubt on that element. Asymptomatic herpes is common, and many people genuinely do not know they carry the virus.

Reckless Endangerment and Herpes

Reckless endangerment is a general criminal law doctrine that has been applied to herpes non-disclosure cases in states without specific STD exposure statutes. It covers situations where a person consciously disregards a substantial and unjustifiable risk of harm to another person.

A person who knows they have herpes, understands it can be transmitted through sexual contact, and has unprotected sex without disclosure fits the profile of reckless endangerment in many jurisdictions. The risk is substantial, the disregard is conscious, and the potential harm is a lifelong infection.

Some state courts have accepted reckless endangerment charges in STD cases. Others have been more reluctant, particularly where the state legislature has already addressed STD exposure in a specific statute, on the theory that the legislature created the applicable rule.

Reckless Endangerment in STD Cases: How Courts Have Ruled:

Think of reckless endangerment as a legal backstop. When a state has no specific STD exposure law, prosecutors can reach for the general reckless endangerment statute to address the same conduct. It is less precise but still effective in some cases.

Herpes Non-Disclosure Laws by State

Herpes non-disclosure laws vary dramatically by state, from strict felony statutes that require no proof of transmission to states with no specific criminal law at all. Understanding the rules in your state is the only way to know your actual legal exposure.

The variation reflects different political philosophies about criminalization, different public health approaches, and different timelines for when laws were enacted. States that enacted broad STD criminalization laws in the 1990s and never reformed them sit alongside states that have updated their approach based on modern public health research.

Herpes Non-Disclosure Law Overview by State:

Colorado is notable for repealing its criminal STD exposure statute in recent years, shifting entirely to a civil law framework. This reflects the most progressive end of the reform spectrum.

New York does not have a specific criminal STD exposure statute but allows robust civil lawsuits, which in practice may provide more meaningful recourse for infected partners than criminal prosecution.

STD Disclosure Laws by State

STD disclosure laws by state cover a broader category than just herpes, but herpes is typically included in states that use the language “sexually transmitted disease” or “communicable disease.” The rules for disclosure requirements, where they exist, apply to any diagnosed STD, including both HSV-1 and HSV-2.

Some states distinguish between different STDs in their laws. HIV historically received the most specific legislative attention. Herpes falls into a secondary category in some statutes, covered by broader language rather than specific mention. That broader language typically creates the same legal obligation.

How State STD Laws Cover Different Infections:

• HIV-specific statutes: targeted laws with specific HIV focus, varying penalties
• Broad STD statutes: cover all sexually transmitted diseases including herpes
• Communicable disease statutes: even broader, may include non-sexual transmission routes
• No specific statute: civil law only, no criminal exposure

The reform trend has been toward reducing penalties for HIV specifically, and some reform bills have had the secondary effect of also reducing penalties for other STDs including herpes. Advocates argue that criminalization discourages testing and treatment by creating legal incentives to remain undiagnosed.

Key Takeaway: STD disclosure laws by state reflect a patchwork of different approaches. Some states impose felony-level criminal liability for herpes non-disclosure. Others have eliminated criminal penalties entirely and rely on civil law instead.

Can You Be Sued for Not Disclosing Herpes

Yes, you can be sued for not disclosing herpes in a civil lawsuit. Civil liability for herpes non-disclosure exists in every US state, even in states with no criminal STD statute. The civil route is separate from and independent of any criminal case.

A civil lawsuit for herpes non-disclosure is typically filed under one or more tort theories. Negligence is the most common, arguing that the defendant failed to exercise reasonable care by not disclosing. Battery is also used, arguing that sexual contact without disclosure was legally non-consensual. Intentional infliction of emotional distress is sometimes added when conduct was particularly egregious.

Civil cases are decided by a preponderance of the evidence, a lower standard than the criminal “beyond a reasonable doubt” bar. That lower standard makes civil suits more likely to succeed even in cases where criminal prosecution would be difficult to prove.

Civil Lawsuit Theories in Herpes Non-Disclosure Cases:

Negligence per se is a powerful theory in states with criminal STD exposure statutes. If a state law requires disclosure and a defendant violated that law, a civil plaintiff can use the statutory violation as proof of negligence without having to separately establish what reasonable care requires.

Civil Lawsuit for Herpes Transmission

A civil lawsuit for herpes transmission is a tort case brought by the infected person against the person who transmitted herpes without disclosing their diagnosis. These cases are filed in civil court, proceed independently from any criminal case, and can result in money damages.

Successful civil plaintiffs in herpes transmission cases have recovered damages for medical expenses, emotional distress, lost wages, and in some cases punitive damages when the defendant’s conduct was particularly deliberate or egregious. Punitive damages are not awarded in every case but are available when courts find that the defendant acted with malice or conscious disregard for the plaintiff’s rights.

The statute of limitations for a civil herpes transmission claim varies by state. Most states apply the general personal injury statute of limitations, typically two to three years from the date of discovery of the infection or the date the plaintiff knew or should have known who transmitted it.

Civil Damages Available in Herpes Transmission Lawsuits:

• Medical expenses: treatment, antiviral medications, ongoing care costs
• Emotional distress: documented psychological impact of the diagnosis
• Lost income: if diagnosis caused work disruption or career impact
• Pain and suffering: general non-economic damages
• Punitive damages: available in some states when conduct was willful

Proving the source of transmission is one of the most challenging aspects of these cases. Herpes is common, and a plaintiff must establish that the defendant was the specific source. Medical records, timing of diagnosis, sexual history evidence, and in some cases genetic testing of the viral strain are used to establish source.

Penalty for Not Disclosing Herpes

The penalty for not disclosing herpes ranges from a civil damages award to a misdemeanor fine to a felony prison sentence depending on the state and the circumstances. The variation is significant enough that two people in different states doing the exact same thing can face vastly different legal consequences.

On the criminal side, Iowa’s Class B felony carries up to 25 years in prison. California’s misdemeanor carries up to 6 months. Florida can escalate from misdemeanor to felony for repeat violations. Illinois sits in the middle with a Class 2 felony carrying up to 7 years.

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On the civil side, there is no statutory cap on damages in most states. Plaintiffs have recovered amounts ranging from a few thousand dollars to multi-million dollar judgments in highly publicized cases.

Criminal Penalty Summary:

Civil penalties are determined by the facts of each case and are not capped by the statutes above. A defendant could face both criminal penalties and a separate civil judgment for the same conduct.

What Happens If You Give Someone Herpes Without Telling Them

If you give someone herpes without telling them you have it, you face potential criminal charges in many states and a civil lawsuit in every state. The legal consequences multiply when actual transmission occurred because transmission provides clearer evidence for both criminal prosecution and civil liability.

In states with specific STD exposure laws, actual transmission can elevate the offense level. Some statutes distinguish between “exposure” and “transmission,” with transmission carrying a higher penalty. Iowa’s statute, for example, focuses on the act of exposure rather than requiring transmission, but having transmission occur strengthens prosecution evidence considerably.

In a civil lawsuit, actual transmission is the clearest proof of harm. A plaintiff who was diagnosed with herpes after sexual contact with a known carrier, who did not disclose, has a strong factual foundation for a civil claim.

Legal Consequences When Transmission Occurs:

• Criminal prosecution becomes easier because transmission proves exposure happened
• Civil lawsuit damages increase to include medical treatment costs and emotional harm
• Some state statutes elevate the offense when transmission actually occurs
• Partner notification obligations may be triggered through public health channels
• Medical records from the plaintiff’s diagnosis can be used as evidence in both proceedings

The timing of the plaintiff’s diagnosis relative to the last sexual contact is critical evidence. A diagnosis shortly after a specific encounter with a known carrier creates a much stronger evidentiary connection than a diagnosis years later with multiple possible sources.

Is Herpes a Reportable Disease

Herpes is not a nationally reportable disease to the CDC in most circumstances. The CDC does not require states to report individual herpes diagnoses, and herpes does not appear on the standard national notifiable disease list for HSV-2 in most states.

This is an important distinction from diseases like HIV, syphilis, gonorrhea, and chlamydia, which are all nationally reportable. Healthcare providers who diagnose those infections are required to report them to the state health department. Herpes generally does not carry the same mandatory reporting requirement.

Some states have their own reporting requirements that go beyond federal standards. Nevada, for example, has had provisions relating to reporting STDs more broadly, though herpes specifically has historically not been required to be reported in most state systems.

Reportable STD Status by Disease:

The non-reportable status of herpes does not reduce any individual legal disclosure obligation. The reporting requirement is a public health surveillance mechanism. The disclosure obligation is a legal one between individuals in a private relationship.

Herpes Disclosure and Consent

Herpes disclosure and consent are legally intertwined because courts in several states have ruled that sexual consent given without material disclosure of an STD is not legally valid consent. This theory connects herpes disclosure law directly to sexual assault and battery doctrine.

Under this framework, a sexual encounter that appears consensual on the surface can be reconsidered as non-consensual if one party concealed a herpes diagnosis. The consent was based on incomplete or false information about a fact that the partner would have found material to their decision.

This theory has been used in both criminal and civil cases. On the criminal side, it supports charges of sexual battery or assault. On the civil side, it supports a battery claim. The theory is more accepted in some jurisdictions than others, but it has a documented presence in American case law.

Consent and Disclosure: Key Legal Concepts:

• Informed consent: consent based on all material facts, including STD status
• Fraud vitiating consent: concealment of a material fact can nullify apparent consent
• Sexual battery: unlawful sexual contact without valid consent
• Material fact standard: a fact is material if it would affect a reasonable person’s decision

Think of it like signing a contract without being told a key term. A contract signed under material misrepresentation can be voided. Consent to sex given without disclosure of a material health fact follows a similar logic in jurisdictions that accept the theory.

The practical implication is that herpes disclosure is not just an ethical obligation. In states that accept the vitiating consent theory, it is also what separates consensual sex from a potential battery charge.

Frequently Asked Questions

Is it always illegal to have sex without disclosing herpes in the US?

No, it is not always illegal everywhere in the US, but it is illegal in a significant number of states.
States with criminal STD exposure or transmission statutes make it a crime to engage in sexual activity without disclosing a known herpes diagnosis.
In states without a specific criminal statute, the act is not criminally illegal but can still result in a civil lawsuit for damages.
The legal landscape varies dramatically by state, from felony-level criminal liability to civil-only consequences.

Can you go to jail for not telling a partner you have herpes?

Yes, you can go to jail for not disclosing herpes in states with criminal STD exposure laws.
Iowa classifies the offense as a Class B felony with up to 25 years in prison under Iowa Code Section 709C.1.
Illinois, Nevada, and North Dakota classify it as a felony with sentences ranging from 3 to 7 years.
California reformed its law in 2017 and now treats it as a misdemeanor with up to 6 months for most cases.

Can someone sue you for giving them herpes without disclosure?

Yes, a person can sue for herpes transmission without disclosure in every US state through civil tort law.
The most common legal theories are negligence, battery, and fraud, all of which apply when someone transmits herpes without prior disclosure.
Civil cases require proof by a preponderance of the evidence, a lower standard than criminal cases, making them more likely to succeed.
Damages can include medical costs, emotional distress, and in egregious cases, punitive damages.

Is herpes a reportable disease that the government tracks?

Herpes is not a nationally reportable disease in the United States and does not appear on the CDC’s required notifiable disease list for most states.
Unlike HIV, syphilis, gonorrhea, and chlamydia, herpes diagnoses are generally not required to be reported to state health departments.
This non-reportable status has no effect on the individual legal obligation to disclose to sexual partners in states with disclosure laws.
Some states may have broader disease reporting requirements, but herpes is typically excluded even in those frameworks.

What is the legal standard for proving herpes non-disclosure in court?

In a criminal case, the prosecution must prove beyond a reasonable doubt that the defendant knew about the herpes diagnosis and had sex without disclosing it.
In a civil case, the plaintiff must prove by a preponderance of the evidence, meaning more likely than not, that the defendant had herpes, knew it, did not disclose, and caused harm.
The knowledge element is often the most contested, as defendants may argue they did not know they had herpes or were never formally diagnosed.
Medical records, prior partner communications, healthcare provider testimony, and the timing of the plaintiff’s diagnosis relative to the sexual encounter are common evidence types used in both criminal and civil proceedings.

US herpes disclosure law is more serious and more state-specific than most people realize. Whether the consequences are criminal, civil, or both depends on where you live and the specific facts of the situation.

Bookmark this page for reference, and share it with anyone who needs a clear, factual answer on what the law actually says about herpes disclosure in 2026.

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