Is It Illegal to Give Someone an STD in 2026 Explained

Yes, it can be illegal to give someone an STD, and in many US states it is a criminal offense if you knew about your infection and did not disclose it. The law draws a sharp line between accidental transmission and knowing exposure.

Most people assume this only applies to HIV. That’s wrong. Many states have laws covering a wide range of sexually transmitted infections, and civil lawsuits are possible in virtually every state regardless of whether criminal charges are filed.

This article breaks down the criminal laws, the civil liability rules, the state-by-state picture, disease-specific rules, and what both the person who transmitted an infection and the person who received it need to understand about the law in 2026.

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Is It Illegal to Give Someone an STD

Yes, giving someone an STD can be illegal in the United States, but whether it is a crime depends on your state, the specific infection, and whether you knew about your status. Not all STD transmission is criminal. The law generally targets knowing or reckless exposure, not accidental transmission.

Most US states have some form of law that applies to STD transmission. Some states have specific communicable disease statutes. Others rely on general criminal laws like reckless endangerment, criminal negligence, or assault. A few states have HIV-specific criminal statutes that apply regardless of whether transmission actually occurs.

The key legal concept is knowledge. A person who did not know they had an STD and transmitted it to a partner is in a very different legal position from a person who knew, chose not to disclose, and had unprotected sex. The second scenario is where criminal and civil liability becomes real and documented.

Is It Illegal to Knowingly Give Someone an STD

Knowingly giving someone an STD is a criminal offense in the majority of US states. The word “knowingly” is the legal trigger that separates criminal liability from a tragic but non-criminal health event.

To establish criminal liability for knowing transmission, prosecutors generally must prove: that the defendant knew they had the infection, that they engaged in conduct capable of transmitting it, that the other person did not consent to the risk of exposure, and in some states, that actual transmission occurred. The specific elements vary by state statute.

Some states take a broader approach and criminalize exposure even without transmission. In those states, having unprotected sex while knowing you are infected, without disclosing, is a crime even if your partner did not actually contract the infection. Iowa Code Section 709C is one example of this approach for HIV.

Other states require that transmission actually happen before criminal liability attaches. This distinction matters enormously to how aggressively these cases are prosecuted and how difficult they are for prosecutors to win.

Quick Facts:

• Knowledge of infection is the central legal requirement in most states
• Some states criminalize exposure without transmission
• Other states require actual transmission for a criminal offense
• Consent or disclosure by the infected partner can defeat criminal charges
• The burden of proof in criminal cases is beyond a reasonable doubt

Is It Illegal to Give Someone an STD Without Telling Them

Giving someone an STD without telling them is illegal in most US states that have communicable disease or STD-specific statutes. The non-disclosure element is exactly what these laws are designed to address.

Florida Statute Section 384.24 makes it unlawful for a person who has a sexually transmissible disease and knows it to have sexual intercourse with any other person unless the other person has been informed of the disease. This statute covers a broader range of STDs beyond HIV. Violation is a first-degree misdemeanor, carrying up to one year in jail and a fine up to $1,000.

California Health and Safety Code Section 120291 addresses HIV specifically and makes it a felony to willfully expose another person to HIV through unprotected sex when knowing one is infected. Non-disclosure is central to this offense. The law was modified by California’s SB 239 in 2017, reducing penalties and requiring actual intent to transmit rather than mere recklessness.

Non-disclosure alone, without sexual contact, is generally not criminalized. The offense typically requires both non-disclosure and an act of sexual contact capable of transmitting the infection.

Is It Illegal to Knowingly Spread an STD

Knowingly spreading an STD is treated as a serious legal violation across most of the United States, though the criminal category ranges from misdemeanor to felony depending on the state and the specific infection. HIV tends to attract the most severe criminal penalties, but many states apply their laws to other infections as well.

Georgia Code Section 16-5-60 covers reckless conduct that endangers others, and courts have applied it to STD transmission cases. Georgia also has specific provisions under its public health code. In documented Georgia cases, defendants have faced felony charges for knowingly spreading HIV to multiple partners.

The “knowingly” standard matters for both prosecution and defense. A defendant who argues they did not know they were infected at the time of transmission has a genuine defense in most jurisdictions. The prosecution must prove beyond a reasonable doubt that the defendant had actual knowledge of their infection status.

Recklessness is a lower standard than knowing intent. Some state statutes cover reckless transmission, meaning a person who had strong reasons to suspect they were infected but avoided testing could still face liability. Courts have accepted this argument in civil cases more readily than in criminal prosecutions.

Key Takeaway: Knowingly spreading an STD is a crime in most US states, but the specific offense level, from misdemeanor to felony, depends on which state you are in, which infection is involved, and whether actual transmission occurred.

Can You Go to Jail for Giving Someone an STD

Yes, you can go to jail for giving someone an STD in the United States if you knew about your infection and did not disclose it. Jail and prison sentences for STD-related criminal offenses have been handed down in multiple documented cases across the country.

The severity depends heavily on the state and the infection. HIV-related criminal cases carry the highest penalties. Iowa’s HIV criminal exposure statute, Iowa Code Section 709C, is classified as a Class B felony carrying up to 25 years in prison. This is one of the harshest STD-related criminal penalties in the country.

California reduced its HIV transmission penalties significantly with SB 239 in 2017. Before the reform, HIV exposure in California was a felony carrying up to eight years in prison. After SB 239, the maximum is six months for knowingly exposing someone, with higher penalties reserved for cases where the defendant intended to transmit the virus.

For non-HIV STDs, jail sentences are possible but typically shorter. Florida’s misdemeanor classification for general STD non-disclosure carries up to one year. Texas classifies certain knowing STD exposures as misdemeanors with fines and potential jail time of up to 180 days depending on the offense.

What Happens If You Knowingly Give Someone an STD

If you knowingly give someone an STD, you face two parallel legal risks: criminal prosecution by the state and a civil lawsuit filed by the person you infected. Both tracks can proceed at the same time, and a criminal conviction can make the civil lawsuit significantly easier to win.

On the criminal side, a prosecutor must decide whether to charge you based on the available evidence, your state’s applicable statute, and the severity of the case. Documented cases show that prosecutions happen most often when the infected person has multiple partners they did not disclose to, when the infection is HIV, and when there is clear evidence of prior knowledge of the infection through medical records or prior treatment.

On the civil side, the person you infected can sue you regardless of whether the state pursues criminal charges. Civil courts apply a lower standard of proof: preponderance of the evidence, meaning more likely than not. A civil plaintiff can win money damages for medical expenses, pain and suffering, lost wages, and in some cases punitive damages when the defendant’s conduct was particularly reckless or intentional.

The practical aftermath for a convicted defendant can extend beyond jail time. A felony conviction for HIV exposure in some states can require sex offender registration. This has been a controversial aspect of HIV criminalization law that several states, including California, have moved away from.

Is It Illegal to Have Sex Without Disclosing an STD

Having sex without disclosing an STD is illegal in most states that have communicable disease statutes, and the law generally treats non-disclosure as the central offense. The act of having sex without telling your partner about a known infection is the conduct that most state statutes target.

Florida Statute 384.24 is one of the broadest in this area. It does not require that transmission actually occur. If a person with a known sexually transmissible disease has sexual intercourse without informing their partner, the law is violated at the moment of non-consensual exposure regardless of whether the partner contracts anything.

Consent plays a critical role. If a person discloses their infection and their partner consents to sex knowing the risk, criminal charges under most state statutes cannot be sustained. The disclosure eliminates the non-consensual exposure element that makes the conduct illegal.

Think of non-disclosure like fraud. When you withhold a material fact that your partner needs to make an informed decision, you are removing their ability to give meaningful consent. Courts and legislatures have treated this removal of informed consent as the core harm that these laws address.

Key Takeaway: Having sex without disclosing a known STD is illegal in most states with communicable disease or STD-specific statutes. The non-disclosure itself, not just the transmission, is the central legal wrong that most of these laws target.

Criminal Charges for Giving Someone an STD

Criminal charges for giving someone an STD can take several different forms depending on the state and the facts of the case. The most common criminal charges pursued in documented cases include specific STD or HIV transmission statutes, assault, reckless endangerment, and in extreme cases, attempted murder.

Assault charges have been used in multiple states that do not have specific STD statutes. Courts have found that knowingly exposing someone to a life-threatening infection can meet the definition of assault. This is particularly common in HIV cases where defendants who were aware of their positive status engaged in unprotected sex with non-consenting or non-informed partners.

Attempted murder charges have been brought in a small number of documented cases, generally involving HIV and deliberate, repeated exposure with evidence of intent to harm. These charges are rare and difficult to sustain, but they have resulted in convictions in a handful of cases across states including Texas and Virginia.

The most straightforward criminal path is through state-specific communicable disease statutes where they exist. These statutes eliminate the need for prosecutors to stretch general criminal law definitions and provide clear elements that make prosecution more predictable.

Criminal charge types used in STD cases:

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• Specific STD/HIV transmission statutes (where available)
• Reckless endangerment
• Criminal assault or battery
• Attempted murder (in extreme, documented cases)
• Bioterrorism statutes (extremely rare, extreme cases)
• Public health law violations

Is It a Felony to Give Someone an STD

Whether giving someone an STD is a felony depends on the state and the specific infection. HIV-related transmission offenses are classified as felonies in many states. General STD transmission offenses are more commonly misdemeanors, though felony classifications exist in some jurisdictions.

Iowa’s HIV exposure law is the starkest example of felony-level treatment. Iowa Code Section 709C classifies knowing HIV exposure without disclosure as a Class B felony, which is among the most serious felony categories in Iowa’s criminal code, carrying up to 25 years imprisonment.

Several states have reduced their HIV-related felony classifications following advocacy from public health researchers and civil rights groups who argued that felony treatment of HIV status was medically outdated and discriminatory. California’s SB 239 in 2017 was the most significant reform. It reduced knowing HIV exposure from a felony to a misdemeanor in most circumstances, aligning California’s law more closely with the medical reality that HIV is now a manageable chronic condition.

For non-HIV STDs, felony treatment is less common but not unknown. States that classify repeated, deliberate STD exposure as a pattern of reckless conduct may escalate charges to felony level based on aggravating factors like the number of victims or the presence of intent to harm.

Penalty for Knowingly Spreading an STD

The penalty for knowingly spreading an STD ranges from a fine and a short jail sentence to decades in federal or state prison, depending on the state, the infection, the offense level, and the defendant’s prior record. No single national penalty standard exists.

At the lower end, Florida’s misdemeanor classification for general STD non-disclosure carries a maximum of one year in county jail and a fine up to $1,000. At the upper end, Iowa’s Class B felony for HIV exposure carries up to 25 years in prison, though sentences that high are rarely imposed in practice for a first offense.

Civil penalties add another financial dimension. In documented civil cases, damages awarded to plaintiffs who contracted STDs through non-disclosure have ranged from tens of thousands of dollars to several million dollars in cases involving particularly egregious conduct or severe long-term health consequences.

The practical reality is that prosecution rates for STD transmission crimes are relatively low. Cases that get prosecuted tend to involve clear evidence of prior knowledge, multiple victims, and serious health consequences. First-time offenders with no prior record and a single victim often face plea offers to reduced charges.

Bold fact: Iowa’s HIV exposure statute carries a maximum of 25 years in prison, making it one of the harshest STD-related criminal penalties in the United States as of 2026.

HIV Transmission Laws by State

HIV transmission laws vary dramatically by state in 2026, and the trend over the past decade has been toward reform rather than expansion. Many states enacted HIV-specific criminal statutes in the 1980s and 1990s when HIV was widely understood as a death sentence. Medical advances have prompted legal reconsideration.

California’s SB 239, signed in 2017, replaced a felony HIV exposure statute with misdemeanor penalties in most cases. The reform requires proof of intent to transmit the virus rather than mere recklessness, aligning the law with how HIV is now medically understood. California remains one of the leading examples of HIV law modernization.

Iowa, by contrast, retains one of the harshest HIV criminal statutes in the country. Iowa Code Section 709C criminalizes knowing HIV exposure as a Class B felony without requiring actual transmission or actual intent to harm. Iowa has faced significant criticism from public health advocates for this approach.

Several states have no HIV-specific statute at all and rely on general criminal law. These states tend to see fewer prosecutions because prosecutors must fit HIV cases into general assault or reckless endangerment frameworks, which is more difficult than applying a specific statute.

Is It Illegal to Give Someone Herpes

Giving someone herpes is not subject to the same specific statutory treatment as HIV in most states, but it is not outside the reach of the law. People have been successfully sued in civil court for transmitting herpes, and criminal charges under general reckless endangerment or assault statutes have been pursued in some cases.

Herpes is caused by herpes simplex virus type 1 or type 2. It is among the most common STDs in the United States, affecting an estimated 12% of people aged 14 to 49 for HSV-2 alone according to CDC data. Its prevalence and the fact that many people transmit it without knowing they are infected creates a legally complex picture.

Civil lawsuits for herpes transmission have a long documented history in the United States. Courts have awarded damages to plaintiffs who proved that a partner knew they had herpes, did not disclose, and transmitted it. The key elements in a civil herpes case mirror those of other STD transmission claims: knowledge, failure to disclose, transmission, and resulting harm.

Criminal charges for herpes transmission are less common than for HIV but not unheard of. States with broad communicable disease statutes, including Florida, can technically apply their laws to herpes. Florida Statute 384.24 covers “sexually transmissible disease,” a category that includes herpes. Knowingly having sex without disclosure while infected with herpes in Florida could constitute a misdemeanor under that statute.

Is It Illegal to Give Someone Chlamydia

Giving someone chlamydia is not typically the subject of a specific criminal statute in any US state, but it can fall under general STD transmission laws and is actionable as a civil matter in most jurisdictions. Chlamydia is a bacterial infection and the most commonly reported STD in the US, with over 1.6 million cases reported to the CDC annually.

Most state communicable disease statutes that cover STDs broadly enough to include chlamydia require proof that the defendant knew about their infection. This is harder to establish for chlamydia than for HIV or herpes because chlamydia is often asymptomatic. A person can carry and transmit chlamydia without ever receiving a diagnosis.

Where proof of knowledge exists, such as through documented medical records showing a prior diagnosis, civil lawsuits for chlamydia transmission have been pursued. Medical costs, emotional distress, and in cases involving complications like pelvic inflammatory disease or infertility, significant consequential damages are possible.

Florida’s broad STD statute again offers the clearest criminal path. If a person with a documented chlamydia diagnosis fails to disclose and engages in sexual intercourse, Statute 384.24 could technically apply. Prosecution for chlamydia specifically has been documented far less frequently than for HIV or herpes, but the legal framework exists in states with broad communicable disease laws.

Key Takeaway: Herpes and chlamydia are less commonly the subject of criminal prosecution than HIV, but civil lawsuits for transmission are well-established in US courts, and broad state communicable disease statutes like Florida’s can technically apply to any sexually transmitted infection.

Civil Lawsuit for Giving Someone an STD

A civil lawsuit for giving someone an STD is possible in every US state, regardless of whether criminal charges are pursued. The civil track runs on a lower burden of proof and can result in substantial financial compensation for the plaintiff.

The two main civil theories used in STD transmission cases are negligence and battery. Negligence requires proving that the defendant had a duty to disclose, breached that duty by failing to disclose, that the breach caused the plaintiff’s infection, and that the infection caused damages. Battery requires proving intentional harmful or offensive contact without consent.

Battery claims tend to result in larger damages awards because they carry the possibility of punitive damages, which are designed to punish particularly egregious conduct rather than simply compensate the victim. In documented STD civil cases, punitive damage awards have ranged from tens of thousands to millions of dollars where the defendant’s conduct was found to be deliberate and reckless.

Civil cases also have a lower standard of proof than criminal cases. A plaintiff must prove their case by a preponderance of the evidence, meaning more likely than not. This is significantly easier than the criminal standard of beyond a reasonable doubt, which is why civil success rates in STD transmission cases are higher than criminal conviction rates.

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Can You Sue Someone for Giving You an STD

Yes, you can sue someone for giving you an STD, and courts across the US have allowed these cases to proceed and have awarded plaintiffs significant damages. The legal theory, evidence requirements, and likely outcome depend on what you can prove and which state you are in.

To succeed in a civil lawsuit for STD transmission, you generally need to prove four things. First, that the defendant knew they had the infection. Second, that they failed to disclose it to you before sexual contact. Third, that you contracted the same infection from them. Fourth, that you suffered damages as a result.

Proving transmission from a specific person can be challenging medically and legally. The defense will often argue that the plaintiff could have contracted the infection from another source. Plaintiffs who can point to a single partner, supported by medical records showing a diagnosis shortly after a new sexual relationship, are in the strongest position.

Damages in documented civil STD cases have included medical treatment costs, future treatment costs for chronic infections like HIV or herpes, lost wages due to health impacts, pain and suffering, emotional distress, and punitive damages where the conduct was particularly egregious. Some reported settlements and verdicts have exceeded $1 million in cases involving deliberate transmission of HIV.

STD Transmission Laws by State

STD transmission laws vary widely by state, and no two states have identical frameworks. The patchwork of laws means that the same conduct could be a felony in one state, a misdemeanor in another, and subject only to civil liability in a third.

States with specific STD or communicable disease transmission statutes include Florida, California, Iowa, Texas, Georgia, North Carolina, and several others. States without specific statutes rely on general criminal law frameworks, which are harder to apply and result in fewer prosecutions.

The trend since 2017 has been toward reform of the harshest HIV-specific criminal statutes rather than expansion of STD criminalization. Several states have modernized their laws to account for medical advances, require actual intent to transmit, and avoid criminalizing people who take protective measures like using medication that reduces viral load to undetectable levels.

Public health researchers have argued that overly broad criminalization laws can actually harm public health by discouraging people from getting tested, since a positive diagnosis creates legal exposure. This argument has influenced reform efforts in California, Colorado, and a growing number of other states.

STD Disclosure Laws

STD disclosure laws are the legal requirements that obligate a person who knows they have an STD to inform a partner before sexual contact. These laws exist in various forms across most US states and are distinct from, though related to, the criminal transmission statutes.

Some states frame disclosure as a public health obligation. Florida’s communicable disease law requires disclosure as a matter of public health policy, not just as an element of a criminal offense. Violation of the disclosure requirement itself is the offense, even if no transmission occurs.

Other states embed disclosure requirements within their criminal transmission statutes, meaning disclosure is the act that prevents criminal liability. If a person discloses their status and their partner consents to proceed, the criminal statute’s elements cannot be met, and no crime occurs regardless of whether transmission happens.

Disclosure laws also intersect with partner notification programs run by state health departments. When a person is diagnosed with a reportable STD, health departments may contact recent partners to inform them of potential exposure. This public health function is separate from the legal disclosure obligation but reflects the same underlying policy goal.

STD disclosure law key points:

• Disclosure must happen before sexual contact, not after
• Verbal disclosure is sufficient in most states; written documentation is not required but is advisable
• The partner’s consent after disclosure generally eliminates criminal liability
• Disclosure to a healthcare provider does not substitute for disclosure to a partner
• Partner notification programs by health departments are separate from legal disclosure obligations

What States Have STD Transmission Laws

The majority of US states have some form of law that applies to STD transmission, though the specifics vary dramatically. States fall into three broad categories: those with specific STD or HIV transmission criminal statutes, those that rely on general criminal law, and those with public health codes that create civil or administrative liability.

States with specific criminal STD statutes include Florida, California, Iowa, Texas, North Carolina, Georgia, Illinois, Michigan, and others. These states have statutes specifically addressing knowing STD or HIV exposure and set out specific elements, defenses, and penalties.

States without specific statutes but with prosecuted cases include New York, Virginia, and several others where prosecutors have used general criminal law frameworks including assault, reckless endangerment, and attempted murder to bring charges in egregious cases.

States with primarily civil or public health law approaches tend to see fewer prosecutions but more administrative enforcement through health department orders and civil litigation.

The National Conference of State Legislatures has documented that over 30 states have laws specifically criminalizing HIV exposure or transmission, though many of these are now being revisited for reform. The national picture in 2026 is one of gradual reform rather than expansion of criminalization.

Key Takeaway: Most US states have some form of legal mechanism to address knowing STD transmission, ranging from specific criminal statutes to general criminal law applications, but the offense level, required elements, and penalties differ significantly from state to state.

Frequently Asked Questions

Is it illegal to give someone an STD if you didn’t know you had it?

No, it is not illegal to transmit an STD if you genuinely did not know you were infected.
The legal standard in virtually every state requires knowledge of the infection before criminal liability or civil negligence can attach.
A person who had no reason to know they were infected cannot be held criminally responsible for transmission.
However, someone who had symptoms or prior reasons to suspect infection but avoided testing may still face liability under a recklessness standard in some states.

Can you go to jail for giving someone herpes in the US?

Yes, going to jail for transmitting herpes is legally possible in states with broad communicable disease statutes like Florida’s.
Florida Statute 384.24 covers all sexually transmissible diseases, which includes herpes, and makes knowing non-disclosure a misdemeanor punishable by up to one year in jail.
Criminal prosecution specifically for herpes transmission is rare in practice but not legally impossible.
Civil lawsuits for herpes transmission are far more common than criminal cases and have resulted in documented damages awards.

What do you have to prove to sue someone for giving you an STD?

To win a civil lawsuit for STD transmission, you must prove that the defendant knew about their infection, failed to disclose it before sexual contact, that you contracted the same infection from them, and that you suffered measurable damages as a result.
The burden of proof is preponderance of the evidence, meaning more likely than not.
Proving transmission from a specific person is often the most challenging element.
Medical records documenting a new diagnosis shortly after a specific new relationship strengthen the case significantly.

Which states have criminal laws against knowingly spreading STDs?

More than 30 states have laws that specifically criminalize knowing STD or HIV transmission or exposure.
States with the most specific statutes include Florida, Iowa, California, Texas, Georgia, Illinois, Michigan, and North Carolina.
Iowa has the harshest penalty at up to 25 years in prison for HIV exposure.
California reformed its law in 2017 to reduce penalties and require actual intent to transmit rather than mere recklessness.

Is HIV transmission treated differently from other STDs under the law?

Yes, HIV transmission has historically been treated more harshly than other STDs under US law, with many states enacting specific felony-level HIV criminal statutes in the 1980s and 1990s.
Most state STD transmission laws that specifically address HIV carry higher penalties than those covering other infections.
A growing number of states have reformed their HIV-specific laws since 2017 to reduce penalties and modernize the law to reflect medical advances.
Other STDs like herpes and chlamydia are more commonly addressed through general communicable disease statutes or civil law rather than HIV-specific criminal codes.

Closing

The legal rules around STD transmission are more serious and more state-specific than most people realize. Criminal charges, civil lawsuits, and public health consequences are all real possibilities for anyone who knowingly exposes a partner without disclosure.

Bookmark this article as a reference for understanding where the law draws these lines in 2026. The state-by-state picture continues to evolve, and knowing the rules that apply in your state is the first step toward understanding your rights and obligations.

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