Is It Illegal to Not Tell Someone You Have Herpes? 2026

In many US states llegal to not tell someone you have herpes before having sex with them. There is no single federal law on this, but dozens of state statutes criminalize knowingly exposing a partner to a sexually transmitted infection without disclosure. The legal consequences range from misdemeanor charges to felony convictions.

Most people assume this is only a moral or ethical issue. That assumption is wrong. Criminal charges have been filed in multiple states, and civil lawsuits for herpes transmission have resulted in significant damages awards.

You might also find this useful — Is It Illegal to Get a Happy Ending? 2026 State Laws

There is also a major myth worth addressing upfront: many people believe that using a condom eliminates any legal obligation to disclose. Most state laws do not treat condom use as a full defense.

This article covers the criminal laws, state-by-state rules, penalty ranges, civil lawsuit options, and valid legal defenses in plain English, based on what the law actually says in 2026.

Is It Illegal to Not Tell Someone You Have Herpes?

In many states, yes, it is illegal to not tell someone you have herpes before engaging in sexual activity with them. The specific laws vary by state, but the legal concept is consistent: knowingly exposing another person to a communicable disease without their informed consent can be a criminal act.

No single federal statute specifically targets herpes non-disclosure. The legal obligations come from state public health laws, STI-specific criminal statutes, and general criminal codes covering reckless endangerment or assault.

States like Iowa, Washington, Florida, and Michigan have laws that explicitly address knowing exposure to sexually transmitted infections. Other states prosecute herpes non-disclosure under broader statutes covering criminal transmission of disease, reckless endangerment, or in severe cases, criminal battery.

The critical legal element in almost every jurisdiction is knowledge. A person who does not know they have herpes cannot be criminally charged for failing to disclose it. The law targets knowing non-disclosure, not unknowing transmission.

Quick Facts:

• Federal law: No specific herpes disclosure statute exists at the federal level
• State laws: Many states have criminal STI exposure statutes that cover herpes
• Key legal element: Knowledge of diagnosis is required for criminal liability
• Civil liability: Exists in most states independently of whether criminal charges are filed
• Enforcement: Varies widely; some states rarely prosecute, others have active case histories

Is It Illegal to Have Herpes and Not Tell Someone?

Having herpes and not telling a sexual partner is illegal in states with STI disclosure or criminal exposure statutes, but simply having herpes is never itself a crime. The illegal act is the combination: having a known diagnosis and engaging in sexual activity without disclosing it.

This distinction matters enormously. A herpes diagnosis does not create any general obligation to announce your status to the world. The legal obligation is specific: it arises at the point of sexual contact with a partner who has not been informed.

Iowa Code Section 709C.1 is one of the clearest examples. It makes it a felony to knowingly expose another person to a contagious or infectious disease, including herpes, through sexual contact without disclosure. The law specifically requires that the person know their diagnosis before criminal liability attaches.

Florida Statute Section 384.24 similarly prohibits a person who knows they have a sexually transmissible disease from having sexual intercourse with another person without first informing them. Florida classifies this as a first-degree misdemeanor, though cases involving willful transmission can be escalated under other statutes.

What creates criminal liability in most states:

• A confirmed herpes diagnosis (knowledge required)
• Engaging in sexual activity with another person
• Failure to disclose the diagnosis before that sexual activity
• In some states: intent to transmit, or recklessness about transmission

Is It Illegal to Have Sex With Herpes Without Telling Your Partner?

Having sex with herpes without telling your partner is a criminal offense in many US states and creates civil liability in virtually every jurisdiction. The specific charge depends on the state statute, but the legal exposure is real and documented with actual prosecutions.

States that explicitly criminalize this conduct include Iowa, Florida, Washington, Michigan, North Carolina, New Jersey, and Georgia among others. Each uses different statutory language and different penalty classifications, but the core prohibition is the same: sexual contact while knowingly infected with a transmissible disease, without informing the partner first.

Washington’s approach under RCW 9A.36.011 allows prosecutors to charge herpes non-disclosure as assault, specifically second or third-degree assault, when a person knowingly exposes another to a communicable disease. Washington courts have accepted this framing in actual prosecuted cases.

The requirement to disclose applies regardless of whether symptoms are present at the time of sexual contact. Herpes can be transmitted even without visible sores or outbreaks. Legal obligations under most state statutes do not have an “asymptomatic exception.” Knowledge of the diagnosis is the trigger, not the presence of symptoms.

Is It Illegal to Spread Herpes?

Intentionally spreading herpes is illegal in most US states, and even reckless transmission without intent can result in criminal charges in states with broad communicable disease exposure statutes. The law distinguishes between intentional transmission, reckless transmission, and negligent transmission, with different consequences for each.

Intentional transmission, meaning a person knowingly has herpes and deliberately attempts to infect their partner, is treated most harshly. Several states allow for felony charges under general criminal statutes covering assault or battery when willful disease transmission is proven.

Reckless transmission is more commonly charged. This occurs when a person knows their diagnosis, does not inform their partner, and engages in sexual activity in a way that creates substantial risk of transmission. Iowa’s felony STI exposure statute and Michigan’s communicable disease law both cover reckless transmission.

Negligent transmission, where a person takes some precautions but falls short of what a reasonable person would do, is primarily a civil liability issue rather than a criminal one. Tort law allows an infected partner to sue for negligent transmission even when criminal standards are not met.

Transmission liability levels:

• Intentional: Criminal felony charges in most states with STI laws
• Reckless (knowingly no disclosure): Criminal misdemeanor to felony depending on state
• Negligent (partial precautions, no disclosure): Civil tort liability in most jurisdictions
• Unknowing (no diagnosis): Generally no criminal or civil liability

Key Takeaway: Knowingly spreading herpes without disclosure is a crime in many states, and even reckless transmission creates legal exposure. The law requires knowledge of the diagnosis; unknowing transmission does not create criminal liability.

Herpes Disclosure Laws by State

Herpes disclosure laws in the US exist at the state level with no federal uniform standard, and they vary significantly in their language, scope, and penalty classifications. As of 2026, at least 25 states have some form of criminal statute that can be applied to herpes non-disclosure.

Some states have laws that specifically name herpes or list it among covered sexually transmitted infections. Others rely on broader public health statutes that cover “communicable diseases” or “sexually transmissible diseases” without naming specific infections. Courts in those states have confirmed that herpes falls within the covered category.

A subset of states, including California, have modernized their STI criminalization laws in recent years. California’s SB 239, signed into law in 2017, significantly modified how California handles STI exposure. The reforms reduced certain HIV-specific provisions from felonies to misdemeanors but did not eliminate criminal exposure liability for other STIs including herpes under Health and Safety Code Section 120291.

The trend across multiple states since 2017 has been to distinguish between HIV and other STIs in criminal law, partly in response to advocacy by public health organizations arguing that broad criminalization discourages testing and treatment. Herpes remains within the scope of criminal exposure statutes in most states that have these laws.

What States Require Herpes Disclosure?

At least 25 to 30 states have laws that require disclosure of a known herpes diagnosis before sexual contact, either through specific STI statutes or through general communicable disease exposure laws. The exact number depends on how broadly state statutes are interpreted and applied.

States with the clearest and most specifically written disclosure obligations include Iowa, Florida, North Carolina, New Jersey, and Michigan. These states have statutes that explicitly require a person with a known sexually transmissible disease to inform a partner before sexual contact occurs.

States like Georgia and Texas do not have herpes-specific disclosure statutes but have applied general reckless endangerment, criminal negligence, or assault statutes to herpes non-disclosure cases in documented prosecutions. The practical effect is similar even without a herpes-specific law.

States with the least clear legal obligations for herpes disclosure include some western states and several northeastern states where either the statutes are narrowly written or have not been applied to herpes cases in documented prosecutions.

States with documented criminal exposure statutes covering herpes:

• Iowa, Florida, Michigan, North Carolina, New Jersey: Explicit STI disclosure statutes
• Washington, Georgia, Texas, Illinois: General statutes applied to herpes cases
• California: Modified statute post-SB 239, still covers STI exposure
• Louisiana, Missouri, Nevada: Criminal exposure provisions include herpes
• Virginia, Oklahoma, Tennessee: Broader communicable disease laws applied

Can You Go to Jail for Not Disclosing Herpes?

Yes, you can go to jail or prison for not disclosing herpes before sex in states with criminal STI exposure statutes. Iowa’s Class B felony STI exposure law carries a maximum of 25 years in prison. Other states carry misdemeanor sentences ranging from 60 days to one year.

The likelihood of actual incarceration depends on the state, the specific circumstances, and whether transmission actually occurred. Prosecutors in states with explicit STI disclosure statutes have brought charges in cases where a partner was infected and evidence of knowing non-disclosure was available.

Iowa has the most aggressive penalty structure. A person convicted of knowingly exposing another to a sexually transmitted disease under Iowa Code 709C.1 faces a Class B felony, which carries up to 25 years in state prison. Iowa courts have applied this statute in actual prosecutions involving herpes.

In states where the charge is a misdemeanor, like Florida under Statute 384.24 for a first-degree misdemeanor, the maximum jail sentence is one year in county jail. Actual sentences in first-offense cases without transmission typically involve fines, probation, or short-term incarceration rather than maximum terms.

For a deeper understanding, check Is It Illegal to Walk Around Without ID? 2026 Laws

Herpes Non-Disclosure Criminal Charges

Criminal charges for herpes non-disclosure are filed under different statutes depending on the state, but they typically fall into one of four legal categories: specific STI disclosure statutes, communicable disease exposure laws, assault or reckless endangerment statutes, and battery by bodily fluids laws.

Specific STI statutes, like Iowa’s 709C.1 and Florida’s 384.24, are the most direct. Prosecutors using these statutes only need to show that the defendant knew their diagnosis, engaged in sexual contact, and failed to disclose. Transmission does not have to be proven for a charge to stick.

Assault and reckless endangerment charges are used in states without specific STI statutes. Washington prosecutors have charged herpes non-disclosure as assault. The legal argument is that knowingly exposing someone to a disease without consent constitutes unlawful contact or puts them at substantial risk of bodily harm, which satisfies assault elements under those states’ general criminal codes.

Battery by bodily fluid statutes, which exist in states like California and Missouri, cover situations where a person knowingly uses a bodily substance to harm or infect another. While these statutes were written primarily in the context of HIV cases, courts have applied them to herpes in some jurisdictions.

Typical elements prosecutors must prove for herpes non-disclosure charges:

• Defendant had a confirmed herpes diagnosis at the time of contact
• Defendant knew of the diagnosis (actual knowledge required, not assumed)
• Defendant engaged in sexual activity with the complainant
• Defendant did not disclose their status before that sexual activity
• In some states: transmission occurred or substantial risk was created

Key Takeaway: Criminal charges for herpes non-disclosure are real and documented in multiple states. Prosecutors do not need to prove transmission in most states; knowing non-disclosure before sexual contact is enough to support a charge.

Herpes Non-Disclosure Penalty

Penalties for herpes non-disclosure range from misdemeanor fines and probation in lenient states to 25-year felony sentences in Iowa, the strictest state on record. The wide range reflects how differently states have chosen to classify and punish this conduct.

Iowa stands out dramatically. Under Iowa Code 709C.1, criminal exposure to a contagious disease is a Class B felony. That is the same classification as attempted murder in Iowa. Critics, including public health advocates and the ACLU, have long argued that the penalty is disproportionate and creates a chilling effect on testing.

At the other end of the spectrum, North Carolina’s statute results in a Class 1 misdemeanor with a maximum of 60 days in jail and a fine. Florida’s first-degree misdemeanor carries up to one year in jail and a $1,000 fine. New Jersey’s fourth-degree crime carries up to 18 months in state prison.

Civil penalties, which are separate from criminal penalties and pursued in civil court, are unlimited by statutory cap in most states and depend on what damages the plaintiff can prove.

Civil Lawsuit for Herpes Transmission

A civil lawsuit for herpes transmission is a separate legal action from any criminal case and can be filed even if no criminal charges were ever brought. Civil courts apply a lower standard of proof than criminal courts, making civil lawsuits a more accessible path for people who were infected without consent.

The legal theories most commonly used in civil herpes transmission suits include intentional battery, negligence, fraudulent misrepresentation, and intentional infliction of emotional distress. A plaintiff does not have to prove all of these; one successful theory is enough to win damages.

Intentional battery is the most straightforward theory. The plaintiff argues that the defendant made intentional physical contact with them, that contact resulted in herpes transmission, and that the defendant knew they were infected but failed to disclose. Courts in California, Texas, Florida, and New York have all allowed herpes transmission suits to proceed on this theory.

Negligence is an alternative when intentional conduct cannot be proven. The plaintiff argues the defendant had a duty to disclose, breached that duty, and the breach caused herpes transmission. This theory does not require proving the defendant intended to infect the plaintiff.

Civil lawsuit elements for herpes transmission:

• Plaintiff must show the defendant knew they had herpes at the time
• Plaintiff must show contact occurred that resulted in transmission
• Plaintiff must show the defendant did not disclose their status beforehand
• Damages can include medical costs, emotional distress, and punitive damages
• Standard of proof: Preponderance of the evidence (more likely than not), not beyond reasonable doubt

Can You Sue Someone for Giving You Herpes?

Yes, you can sue someone for giving you herpes if they knew their diagnosis and failed to disclose it before sexual contact. Civil courts across the US have accepted herpes transmission lawsuits and in documented cases have awarded damages ranging from tens of thousands to millions of dollars.

The burden of proof in a civil case is “more likely than not,” which is significantly lower than the criminal standard of “beyond a reasonable doubt.” That lower bar makes civil suits a viable option even when criminal prosecutors have declined to file charges.

Documented civil case outcomes include a $6.75 million jury award in California against a defendant who knew they had genital herpes and did not disclose it to a sexual partner. A Texas case resulted in a $1.5 million judgment. Multiple cases in New York and Florida have resulted in settlements and verdicts in the hundreds of thousands of dollars.

The practical challenges in a herpes civil suit include proving the defendant knew their diagnosis, proving the defendant was the source of transmission (especially if the plaintiff had other sexual partners), and connecting the transmission to the non-disclosure rather than to a prior unknown exposure.

What you need to file a civil herpes transmission lawsuit:

• Evidence the defendant knew they had herpes before contact
• Medical documentation of your own herpes diagnosis and timing
• Evidence of sexual contact with the defendant around the time of transmission
• Evidence the defendant did not disclose their status
• A civil attorney experienced in tort or personal injury law

Key Takeaway: Civil lawsuits for herpes transmission are well-established in US courts. Damages can be significant, and the lower civil burden of proof makes them more accessible than criminal prosecutions, even without a criminal case.

Criminal vs Civil Liability for Herpes

Criminal and civil liability for herpes non-disclosure are two separate legal tracks that can run simultaneously, independently, or not at all depending on the state and the facts. Understanding the difference is important because they operate under completely different rules.

Criminal liability is initiated by government prosecutors, not by the victim. A person who was infected cannot file criminal charges themselves; they can only report the matter to police or prosecutors, who then decide whether to file charges. The standard of proof is beyond reasonable doubt, and the potential punishment is incarceration or criminal fines payable to the state.

Civil liability is initiated by the victim directly through a civil lawsuit. The plaintiff controls whether to file, the timing, and what claims to assert. The standard of proof is the preponderance of the evidence, meaning more likely than not. If successful, the award goes to the plaintiff as damages, not to the state.

The O.J. Simpson cases offer a useful parallel. Simpson was acquitted in his criminal trial (beyond reasonable doubt standard not met) but found civilly liable for wrongful death (preponderance standard met). Herpes cases can work the same way: a defendant acquitted criminally can still lose a civil suit.

Along the same lines: Is It Illegal to Fly Another Country’s Flag in America? 2026

Herpes Disclosure Laws California

California’s herpes disclosure laws were significantly modified by SB 239, signed into law in October 2017. Before SB 239, California Health and Safety Code Section 120291 made it a felony to knowingly expose another person to HIV without disclosure. SB 239 reduced that to a misdemeanor for HIV but did not eliminate criminal STI exposure liability for herpes.

Under current California law, herpes non-disclosure can still be prosecuted under broader public health and communicable disease provisions. California Health and Safety Code Section 120290 prohibits any person who has a communicable disease from willfully exposing another person to the disease. Herpes qualifies as a communicable disease under California’s classification system.

California also provides a clear civil lawsuit pathway. California courts have repeatedly accepted negligence and intentional tort claims arising from herpes transmission. The $6.75 million verdict mentioned earlier was a California case. California’s statute of limitations for personal injury is two years from the date of discovery of the harm.

California herpes disclosure law summary:

• Health and Safety Code 120291: HIV-specific, now a misdemeanor post-SB 239
• Health and Safety Code 120290: General communicable disease exposure, covers herpes, willful exposure required
• Civil liability: Well established, courts have upheld significant damages
• Statute of limitations for civil suit: Two years from discovery of harm
• Criminal penalty under 120290: Misdemeanor, up to 6 months jail and $1,000 fine

Herpes Disclosure Laws Texas

Texas does not have a herpes-specific disclosure statute, but Texas Health and Safety Code Chapter 81 governs communicable diseases and creates both civil and potential criminal liability for knowing exposure without consent. Texas also allows civil suits under negligence and battery theories in its tort law framework.

Chapter 81 of the Texas Health and Safety Code covers “reportable diseases” and includes provisions that prohibit a person who knows they have a communicable disease from engaging in conduct that could transmit the disease to another person without disclosure. Herpes simplex virus is classified as a communicable disease under Texas regulations.

Texas civil courts have accepted herpes transmission lawsuits. The $1.5 million judgment referenced earlier was a Texas civil case. Texas uses a two-year statute of limitations for personal injury claims, which would apply to a herpes transmission civil suit filed in Texas state court.

Texas criminal prosecutors have used general criminal statutes, including assault and criminal negligence provisions, to charge individuals who knowingly transmitted herpes. These prosecutions are less common than in states with specific STI statutes but documented cases exist.

Texas herpes disclosure framework:

• Texas Health and Safety Code Chapter 81: General communicable disease provisions
• Criminal liability: Possible under assault or criminal negligence statutes
• Civil liability: Negligence and battery theories accepted in Texas courts
• Statute of limitations for civil suit: Two years from discovery
• Documented civil verdict: $1.5 million in reported Texas case

Does Using a Condom Excuse Herpes Disclosure?

Using a condom does not legally excuse the failure to disclose a herpes diagnosis in states with STI disclosure statutes. Most state laws require disclosure regardless of what protective measures are used during sexual contact.

The legal rationale is straightforward. Condoms reduce but do not eliminate the risk of herpes transmission, since herpes can be spread through skin-to-skin contact outside the area covered by a condom. Because transmission risk is not eliminated, condom use does not satisfy the legal requirement to inform a partner of the diagnosis.

Iowa Code 709C.1 and Florida Statute 384.24 both require disclosure regardless of protective measures. Neither statute treats condom use as a complete defense. In some states, condom use may be considered a mitigating factor by a judge during sentencing, but it does not defeat the charge itself.

In civil cases, condom use may reduce damages if a jury finds that it reduced transmission risk and that the plaintiff was partially aware of the risk by engaging in sexual activity. But it does not eliminate liability under most civil theories when disclosure did not occur.

Condom use and legal liability:

• Criminal liability: Condom use does not eliminate the disclosure obligation under most statutes
• Civil liability: Condom use may mitigate damages but does not eliminate liability
• Sentencing: Condom use may be a mitigating factor courts consider at sentencing
• Complete defense: No state statute treats condom use as a complete defense to non-disclosure
• Practical impact: Condom use is legally relevant but not legally decisive

Defenses for Herpes Non-Disclosure

The primary legal defenses available for herpes non-disclosure charges are: lack of knowledge of the diagnosis, informed consent of the partner, the partner’s pre-existing herpes diagnosis, and in some states, evidence of risk reduction measures combined with good faith disclosure attempts.

Lack of knowledge is the strongest and most commonly successful defense. If a person was never formally diagnosed, was diagnosed after the sexual contact in question, or received ambiguous test results, prosecutors face significant difficulty proving the knowledge element required for a criminal conviction.

Informed consent means the partner was told about the herpes diagnosis and agreed to engage in sexual activity with that knowledge. This is a complete defense to both criminal charges and civil liability in most states. The challenge is proving consent occurred, since these conversations typically happen privately without witnesses or documentation.

The partner’s prior herpes diagnosis is a defense to transmission-based civil claims but not necessarily to criminal charges. In states where the crime is complete upon non-disclosure without transmission, a partner who already had herpes does not eliminate the legal violation; it eliminates the harm element relevant to civil damages.

Available legal defenses in herpes non-disclosure cases:

• No knowledge of diagnosis at time of contact: Strongest criminal defense
• Partner’s informed and documented consent: Complete defense to criminal and civil claims
• Partner already had herpes prior to contact: Relevant to civil damages, not always criminal
• Condom use with other risk reduction: Mitigating factor, not a complete defense
• Disclosure was attempted but misunderstood: Factual dispute for jury to resolve
• Testing showed negative result prior to contact: Undermines knowledge element

Frequently Asked Questions

Is it illegal to not tell someone you have herpes in the US?

In many US states, yes, it is illegal to not tell a sexual partner you have herpes before having sex.
No federal law exists specifically for herpes, but at least 25 states have criminal statutes covering knowing STI exposure.
States like Iowa treat it as a felony; others like Florida classify it as a misdemeanor.
The key legal trigger is knowing your diagnosis and having sexual contact without disclosing it.

Can you go to prison for not disclosing herpes to a partner?

Yes, prison sentences are possible in states with felony STI exposure statutes.
Iowa’s law carries a maximum of 25 years in state prison for knowing exposure to a sexually transmitted disease.
Washington, Michigan, and other states allow felony assault charges that carry multi-year prison terms.
First-time offenders in misdemeanor states typically face fines and probation rather than active prison time.

Can you sue someone who gave you herpes without telling you?

Yes, you can sue someone who gave you herpes if they knew their diagnosis and failed to disclose it before sexual contact.
Civil courts apply a lower burden of proof than criminal courts, making lawsuits more accessible than criminal prosecutions.
Documented verdicts include awards in the hundreds of thousands to millions of dollars in California, Texas, and other states.
You generally have two to three years from discovering the transmission to file a civil lawsuit, depending on your state.

Does using a condom mean you don’t have to disclose herpes?

No, using a condom does not eliminate the legal obligation to disclose a herpes diagnosis under most state laws.
Herpes can be transmitted through skin contact outside the area covered by a condom, so transmission risk is not eliminated by condom use.
Most state STI disclosure statutes require disclosure regardless of protective measures.
Condom use may be considered a mitigating factor at sentencing but does not function as a complete defense.

What states have criminal laws about not disclosing herpes?

Iowa, Florida, Michigan, Washington, North Carolina, New Jersey, and California all have criminal statutes that can be applied to herpes non-disclosure.
Iowa has the most severe penalty: a Class B felony carrying up to 25 years in prison.
Other states prosecute under general communicable disease exposure, reckless endangerment, or assault statutes.
At least 25 states have some form of criminal provision that courts have applied or could apply to herpes non-disclosure.

The law around herpes disclosure is more serious and more actively enforced than most people realize. Criminal convictions and significant civil damages are documented realities, not just theoretical possibilities.

Bookmark this page for reference, and share it with anyone navigating these questions in 2026. The legal standards in this area continue to evolve as states reform their STI criminalization statutes, so staying informed matters.

This may also interest you — Is It Illegal to Have a Crack in Your Windshield? 2026