Mpox: Symptoms, Transmission and Prevention

Reviewed: August 12, 2026

Mpox, previously known as monkeypox, is an infectious disease caused by monkeypox virus, an orthopoxvirus. It can cause a painful or itchy rash and other symptoms, but presentation varies: some people have many lesions and flu-like symptoms, while others have only a few localized lesions.

This guide summarizes current public-health information from the World Health Organization and U.S. Centers for Disease Control and Prevention. Outbreak patterns and local vaccination or isolation instructions can change, so follow the health authority responsible for your location.

Do not treat a chatbot answer, social post or undated search snippet as medical confirmation. Compare the claim with the linked public-health source and its review date; our guide to AI mistakes that damage credibility shows why fluent wording is not evidence.

What causes mpox?

Mpox is caused by monkeypox virus (MPXV). Scientists group the virus into clade I and clade II, with recognized subclades. Those names support surveillance and research; they do not let a person identify the virus by looking at a rash.

The disease was named after it was first identified in research monkeys, but monkeys are not the only animals involved and the name does not describe the natural reservoir. Human outbreaks can involve person-to-person transmission as well as exposure to infected animals in some settings.

Do not use a person’s identity, nationality or sexual orientation as a diagnosis. Risk comes from exposure and contact patterns. Stigma can discourage people from seeking care or sharing information needed to stop transmission.

Mpox symptoms and timing

Symptoms usually develop after an interval following exposure. CDC advises monitoring for symptoms for up to 21 days after close contact. Possible symptoms include:

a rash or lesions that may look like pimples or blisters and can be painful or itchy;
fever or chills;
swollen lymph nodes;
headache, muscle aches or backache;
fatigue;
sore throat, nasal congestion or cough.

The rash can occur on the hands, feet, chest, face or mouth, around the genitals or anus, and in other locations. Some people develop general symptoms before the rash; others notice the rash first or have few additional symptoms. A limited rash is still worth medical assessment after a relevant exposure.

A rash alone cannot confirm mpox

Other infections and skin conditions can resemble mpox. Photographs on the internet cannot replace clinical assessment and laboratory testing. Do not squeeze, cut or deliberately open a lesion to “check” it.

How mpox can spread

Mpox can spread through close contact with an infected person, including:

direct contact with rash, scabs or body fluids;
close face-to-face or intimate contact;
contact with contaminated materials such as bedding, towels or clothing;
pregnancy-related transmission to a fetus or around birth;
contact with infected animals in places where animal-to-human transmission occurs.

Sexual contact can be one form of close physical contact, but mpox is not limited to one group or one activity. Anyone can be infected after relevant exposure.

A person can generally spread the virus from the time symptoms start until the rash has fully healed, scabs have fallen off and a fresh layer of skin has formed. Public-health guidance also continues to evaluate transmission around the period before symptoms, so follow the latest local advice after a known exposure.

What to do after possible exposure

Note the contact date and type. Record what happened without sharing another person’s identity publicly.
Contact a healthcare or public-health service. Ask whether monitoring, testing or post-exposure vaccination is recommended.
Watch for symptoms. Monitor your skin and general health for the period advised by the health authority.
Avoid donating blood or other biological material until you have received appropriate advice.
If symptoms begin, reduce contact. Avoid close or intimate contact, do not share personal items and contact a provider before arriving so the facility can prepare.

Do not start unapproved medicines or use household chemicals on the skin. If you are pregnant, immunocompromised, caring for a young child or otherwise at higher risk of severe illness, seek advice promptly rather than waiting for symptoms to become severe.

How mpox is diagnosed

A clinician considers symptoms, exposure history and other possible causes. If testing is appropriate, a trained professional collects material from lesions and sends it to a laboratory. The exact specimen and procedure depend on current clinical guidance.

Tell the provider about:

when symptoms began and how the rash changed;
close contact with a person who had a similar rash or confirmed mpox;
recent travel or animal exposure;
pregnancy, immune conditions or medicines that suppress immunity;
pain, eye symptoms, difficulty eating or drinking and other complications.

Do not hide an exposure because it feels embarrassing. Accurate information helps the clinician select tests and protect other people.

Practical ways to reduce transmission

Avoid direct contact with a suspected or confirmed rash, scabs and body fluids.
Do not share bedding, towels, clothing or personal items with someone who may be infectious.
Clean hands regularly with soap and water or an appropriate hand sanitizer.
Follow healthcare instructions for covering lesions, masks, isolation and cleaning.
Use recommended protective equipment when caring for someone, based on professional guidance.
Avoid contact with sick or dead animals in areas where animal transmission is a concern.
Discuss vaccination promptly after a known exposure or if you are in a locally recommended risk group.

If you are ill, ask someone else to care for pets or livestock when possible and tell your provider about animal contact. Do not abandon or harm an animal because of fear; follow veterinary and public-health advice.

Mpox vaccination

Vaccines can reduce the risk of mpox and severe disease. WHO recommends vaccination as part of a broader public-health response for people at greatest risk during outbreaks, including some close contacts and health workers, according to local policy.

Availability, product authorization, dose schedule and eligibility differ by country. Contact a health authority or qualified provider rather than buying a vaccine or medicine from an unverified seller. After exposure, timing can matter, so ask promptly even if you currently feel well.

Vaccination does not replace monitoring and prevention advice. No vaccine provides perfect protection, and a clinician should evaluate symptoms even in a vaccinated person.

Treatment and recovery

Many people recover with supportive care, but mpox can cause severe illness or complications. Care may include pain control, hydration, nutrition, skin care and prevention or treatment of secondary infections. A clinician decides whether a specific antiviral or specialist treatment is appropriate.

People who may have a higher risk of severe illness include those with significant immune suppression, pregnant people and young children, although individual risk requires clinical assessment. Lesions in or near the eyes, mouth, genitals or anus may need prompt help because pain and complications can be substantial.

Get urgent help for warning signs

difficulty breathing, confusion, fainting or marked weakness;
eye pain, vision changes or lesions near an eye;
inability to drink, signs of dehydration or persistent vomiting;
rapidly worsening rash, spreading redness, pus or other signs of secondary infection;
severe or uncontrolled pain;
concerning symptoms during pregnancy or in an immunocompromised person or child.

How to communicate without stigma

Use neutral language: “a person with mpox,” not a label that defines them by a disease. Share prevention information based on contact, not stereotypes. Protect medical privacy. If contacts need notification, public-health teams can explain confidential options available in the region.

Stigma is not only unkind; it can interfere with outbreak control by making people delay testing and avoid honest contact histories.

Common misinformation to avoid

“Only one community can get mpox.” Anyone can be infected after relevant exposure.
“Every rash is mpox.” Many conditions can look similar; testing and clinical assessment matter.
“It always starts with fever.” Presentation varies, and some people notice a rash first.
“Antibiotics cure mpox.” Antibiotics do not treat viruses, though a clinician may treat a secondary bacterial infection.
“A vaccine makes precautions unnecessary.” Vaccination reduces risk but does not guarantee zero infection.
“Opening a lesion helps diagnose it.” This can cause injury and contamination; specimen collection belongs to trained professionals.

Frequently asked questions

Is mpox the same as smallpox?

No. Both involve orthopoxviruses, but they are distinct diseases caused by different viruses.

How soon can symptoms start?

Timing varies. CDC advises that symptoms usually begin within 21 days of exposure. Follow the monitoring period given by your local health authority.

Can mpox spread without sex?

Yes. Transmission can occur through other close physical contact, contaminated materials and, in some settings, infected animals.

Can I diagnose mpox from a photo?

No. A clinician may need to examine you and arrange laboratory testing because several conditions can resemble mpox.

Should everyone receive an mpox vaccine?

Recommendations are risk-based and depend on local outbreaks, exposure and national guidance. Ask a qualified provider or public-health authority.

Authoritative health sources

Medical disclaimer: This page provides general public-health education and does not replace diagnosis or treatment by a qualified healthcare professional.

Mpox: Symptoms, Transmission, Prevention and When to Get Care

What causes mpox?