What is mpox ( monkeypox )? What are the symptoms of mpox? How does mpox spread? Who is at risk of mpox? Are gay, bisexual, or other men who have sex with men at higher risk of contracting mpox? Mpox (previously known as monkeypox ) is a viral disease caused by an orthopoxvirus called monkeypox virus. It spreads mainly through close contact with someone who has mpox, causing a painful rash, enlarged lymph nodes and fever. It can make people very sick and leave scars. Mpox is a rare disease that is related to smallpox. The disease usually causes flu-like symptoms and swelling of lymph nodes. Rashes, pustules, ulcers, and other lesions tend to appear a few days later. Researchers are still trying to understand precisely how the disease is transmitted, and how symptoms appear in different people. People with monkeypox often get a rash and may have other symptoms like fever, chills, and swollen lymph nodes. Symptoms usually start within 21 days of exposure. Visit a healthcare provider if you have a new or unexplained rash, especially after contact with someone who has monkeypox .
